Номер 659, страница 169 - гдз по геометрии 10-11 класс учебник Атанасян, Бутузов

Геометрия, 10-11 класс Учебник, авторы: Атанасян Левон Сергеевич, Бутузов Валентин Фёдорович, Кадомцев Сергей Борисович, Позняк Эдуард Генрихович, Киселёва Людмила Сергеевна, издательство Просвещение, Москва, 2019, коричневого цвета

Авторы: Атанасян Л. С., Бутузов В. Ф., Кадомцев С. Б., Позняк Э. Г., Киселёва Л. С.

Тип: Учебник

Издательство: Просвещение

Год издания: 2019 - 2026

Уровень обучения: базовый и углублённый

Цвет обложки: коричневый с ромбами

ISBN: 978-5-09-103606-0 (2023)

Допущено Министерством просвещения Российской Федерации

Математика: алгебра и начала математического анализа, геометрия

Глава 7. Метод координат в пространстве. Движения. Параграф 1. Координаты точки и координаты вектора - номер 659, страница 169.

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                          #attributes: array:6 [ …6]
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                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1074
                      #items: array:1 [
                        0 => App\Models\Term {#1075
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                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
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                          #withCount: []
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                          #attributes: array:10 [ …10]
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                          #guarded: array:1 [ …1]
                        }
                      ]
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                    }
                    "field_publication_number" => "11"
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1076
                      #items: array:1 [
                        0 => App\Models\Term {#1077
                          #connection: "mysql"
                          #table: "terms"
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                          #keyType: "int"
                          +incrementing: false
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                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1078
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_under_the_edition_degree" => null
                    "field_cover_description" => "с ромбами"
                    "field_publication_year" => "2019"
                    "field_publication_year_until" => null
                    "field_part" => ""
                    "field_part_writing" => ""
                    "field_second_foreign_language" => null
                    "field_for_whom" => "Учебник для общеобразовательных организаций"
                    "field_allowed" => "Допущено Министерством просвещения Российской Федерации"
                    "field_reserve_field" => "Математика: алгебра и начала математического анализа, геометрия"
                    "field_link_to_source" => null
                    "field_tasks_count" => "1147"
                    "field_priority" => "12"
                    "field_default_folder" => "/geometrija_10/atanasjan-u23/"
                    "field_isbn" => "978-5-09-103606-0 (2023)"
                    "field_cover" => array:1 [
                      0 => "/media/geometrija_10/atanasjan-u23/covers/cover1.webp?ts=1739363242"
                    ]
                    "field_cover_alts" => array:1 [
                      0 => ""
                    ]
                    "field_covers" => array:1 [
                      0 => array:4 [
                        "path" => "/media/geometrija_10/atanasjan-u23/covers/cover1.webp?ts=1739363242"
                        "alt" => ""
                        "width" => "1200"
                        "height" => "1661"
                      ]
                    ]
                    "field_popular_book" => null
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1079
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#1080
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                      #escapeWhenCastingToString: false
                    }
                    "field_old_book" => Illuminate\Database\Eloquent\Collection {#1081
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_url" => "/10-klass/geometrija/atanasjan-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1082
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                        0 => App\Models\Term {#1083
                          #connection: "mysql"
                          #table: "terms"
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                          #keyType: "int"
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                          #touches: []
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                          #guarded: array:1 [ …1]
                        }
                      ]
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                    }
                    "field_metatags_title" => null
                    "field_metatags_description" => null
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                    "breadcrumbs" => array:3 [
                      "class" => 381
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                      "class_subject" => 392
                    ]
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                    "id" => 36
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_tree_default_status" => "tasks"
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                    "field_subject" => Illuminate\Database\Eloquent\Collection {#1051}
                    "field_class" => Illuminate\Database\Eloquent\Collection {#1052}
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1055}
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                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1071}
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1072}
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1074}
                    "field_publication_number" => "11"
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                    "field_for_whom" => "Учебник для общеобразовательных организаций"
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                      0 => "/media/geometrija_10/atanasjan-u23/covers/cover1.webp?ts=1739363242"
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                      0 => array:4 [
                        "path" => "/media/geometrija_10/atanasjan-u23/covers/cover1.webp?ts=1739363242"
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                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1079}
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                    "field_url" => "/10-klass/geometrija/atanasjan-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1082}
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                    0 => "*"
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                }
              ]
              #escapeWhenCastingToString: false
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            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1084
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              #escapeWhenCastingToString: false
            }
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            "id" => 744405
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            "updated_at" => null
            "field_display_title" => "Метод координат в пространстве. Движения"
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            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1050}
            "field_page_start" => "160"
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            0 => "*"
          ]
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      ]
      #escapeWhenCastingToString: false
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    "parent_branches" => Illuminate\Database\Eloquent\Collection {#1121
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        0 => App\Models\Branch {#1129
          #connection: "mysql"
          #table: "branches"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 744405
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Метод координат в пространстве. Движения"
            "field_branch_order" => "7"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1130
              #items: array:1 [
                0 => App\Models\Term {#1047}
              ]
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "160"
            "field_branch_display" => "0"
            "field_branch_expanded" => "0"
            "field_display_branch_in_title" => "1"
            "field_display_task_interval" => "0"
            "field_display_branch_page" => "1"
            "field_branch_title_in_content" => "0"
            "field_navigation_title" => null
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1131
              #items: array:1 [
                0 => App\Models\Book {#1049}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1132
              #items: []
              #escapeWhenCastingToString: false
            }
          ]
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            "id" => 744405
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Метод координат в пространстве. Движения"
            "field_branch_order" => "7"
            "field_url" => null
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          ]
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          #touches: []
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            0 => "*"
          ]
        }
        1 => App\Models\Branch {#1133
          #connection: "mysql"
          #table: "branches"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
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          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 744406
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Координаты точки и координаты вектора"
            "field_branch_order" => "1"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1137
              #items: array:1 [
                0 => App\Models\Term {#1134
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
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                  #perPage: 15
                  +exists: true
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                  #escapeWhenCastingToString: false
                  #attributes: array:7 [
                    "id" => 32
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Параграф"
                    "field_cases" => array:6 [ …6]
                    "field_page_check_not_needed" => null
                    "field_short_name" => "§"
                  ]
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                    "id" => 32
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Параграф"
                    "field_cases" => array:6 [ …6]
                    "field_page_check_not_needed" => null
                    "field_short_name" => "§"
                  ]
                  #changes: []
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                  #guarded: array:1 [
                    0 => "*"
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                }
              ]
              #escapeWhenCastingToString: false
            }
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            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1136
              #items: array:1 [
                0 => App\Models\Book {#1049}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1135
              #items: array:1 [
                0 => App\Models\Branch {#1045}
              ]
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:24 [
            "id" => 744406
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            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1137}
            "field_page_start" => "160"
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            "field_navigation_title" => null
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            "book" => Illuminate\Database\Eloquent\Collection {#1136}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1135}
          ]
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            0 => "*"
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        }
      ]
      #escapeWhenCastingToString: false
    }
    "content" => Illuminate\Database\Eloquent\Collection {#1038
      #items: array:6 [
        0 => App\Models\Element {#1109
          #connection: "mysql"
          #table: "elements"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
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          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:7 [
            "id" => 939454
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1098
              #items: array:1 [
                0 => App\Models\Edition {#1106
                  #connection: "mysql"
                  #table: "editions"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
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                  #perPage: 15
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                  #escapeWhenCastingToString: false
                  #attributes: array:21 [
                    "id" => 2315
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "title" => "Условие"
                    "field_order" => "1"
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1105 …2}
                    "field_content_type" => "free"
                    "field_content_mode" => "text, image"
                    "field_page_content_mode" => "image"
                    "field_content_text_checked" => null
                    "field_page_content_text_checked" => "0"
                    "field_solution_author" => "Автор"
                    "field_moderator" => "pasha"
                    "field_edition_type" => "statement"
                    "field_root_dir" => "0-"
                    "field_responsible" => Illuminate\Database\Eloquent\Collection {#1104 …2}
                    "field_comment" => null
                    "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1102 …2}
                    "field_process_formula" => "wiris"
                    "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1103 …2}
                    "field_content_source" => null
                  ]
                  #original: array:21 [
                    "id" => 2315
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "title" => "Условие"
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                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1105 …2}
                    "field_content_type" => "free"
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                    "field_page_content_text_checked" => "0"
                    "field_solution_author" => "Автор"
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                    "field_root_dir" => "0-"
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              <p><strong>659.</strong> Лежат ли точки <em>А, В, С</em> и <em>D</em> в одной плоскости, если:</p><figure><figure>\n
               <img src="/media/geometrija_10/atanasjan-u23/0-00/659.webp?ts=1745773210" alt="Лежат ли точки А, В, С и D в одной плоскости" loading="lazy" width="1168" height="224">\n
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              <figcaption> </figcaption></figure>
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              <p><strong>659.</strong> Лежат ли точки <em>А, В, С</em> и <em>D</em> в одной плоскости, если:</p><figure><figure>\n
               <img src="/media/geometrija_10/atanasjan-u23/0-00/659.webp?ts=1745773210" alt="Лежат ли точки А, В, С и D в одной плоскости" loading="lazy" width="1168" height="224">\n
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            "text" => "<p>Для того чтобы четыре точки лежали в одной плоскости, необходимо и достаточно, чтобы три вектора, построенные на этих точках с общим началом в одной из них, были компланарны. Условием компланарности трех векторов является равенство нулю их смешанного произведения.</p><p>Смешанное произведение векторов $\vec{a}=(x_1, y_1, z_1)$, $\vec{b}=(x_2, y_2, z_2)$ и $\vec{c}=(x_3, y_3, z_3)$ вычисляется как определитель матрицы, составленной из их координат: $ (\vec{a}, \vec{b}, \vec{c}) = \begin{vmatrix} x_1 & y_1 & z_1 \\ x_2 & y_2 & z_2 \\ x_3 & y_3 & z_3 \end{vmatrix} $</p><strong>а)</strong><p>Даны точки $A(-2; -13; 3)$, $B(1; 4; 1)$, $C(-1; -1; -4)$, $D(0; 0; 0)$. Выберем точку D в качестве общего начала и найдем координаты векторов $\vec{DA}$, $\vec{DB}$ и $\vec{DC}$: $\vec{DA} = A - D = (-2-0; -13-0; 3-0) = (-2; -13; 3)$ $\vec{DB} = B - D = (1-0; 4-0; 1-0) = (1; 4; 1)$ $\vec{DC} = C - D = (-1-0; -1-0; -4-0) = (-1; -1; -4)$</p><p>Теперь вычислим смешанное произведение этих векторов: $ (\vec{DA}, \vec{DB}, \vec{DC}) = \begin{vmatrix} -2 & -13 & 3 \\ 1 & 4 & 1 \\ -1 & -1 & -4 \end{vmatrix} $ $ = -2(4 \cdot (-4) - 1 \cdot (-1)) - (-13)(1 \cdot (-4) - 1 \cdot (-1)) + 3(1 \cdot (-1) - 4 \cdot (-1)) $ $ = -2(-16 + 1) + 13(-4 + 1) + 3(-1 + 4) = -2(-15) + 13(-3) + 3(3) = 30 - 39 + 9 = 0 $</p><p>Поскольку смешанное произведение равно нулю, векторы компланарны, а значит, все четыре точки лежат в одной плоскости.</p><p><strong>Ответ:</strong> да, лежат.</p><strong>б)</strong><p>Даны точки $A(0; 1; 0)$, $B(3; 4; -1)$, $C(-2; -3; 0)$, $D(2; 0; 3)$. Выберем точку A в качестве общего начала и найдем координаты векторов $\vec{AB}$, $\vec{AC}$ и $\vec{AD}$: $\vec{AB} = B - A = (3-0; 4-1; -1-0) = (3; 3; -1)$ $\vec{AC} = C - A = (-2-0; -3-1; 0-0) = (-2; -4; 0)$ $\vec{AD} = D - A = (2-0; 0-1; 3-0) = (2; -1; 3)$</p><p>Вычислим смешанное произведение: $ (\vec{AB}, \vec{AC}, \vec{AD}) = \begin{vmatrix} 3 & 3 & -1 \\ -2 & -4 & 0 \\ 2 & -1 & 3 \end{vmatrix} $ $ = 3(-4 \cdot 3 - 0 \cdot (-1)) - 3(-2 \cdot 3 - 0 \cdot 2) + (-1)(-2 \cdot (-1) - (-4) \cdot 2) $ $ = 3(-12) - 3(-6) - 1(2 + 8) = -36 + 18 - 10 = -28 $</p><p>Смешанное произведение не равно нулю ($-28 \neq 0$), следовательно, векторы некомпланарны, и точки A, B, C и D не лежат в одной плоскости.</p><p><strong>Ответ:</strong> нет, не лежат.</p><strong>в)</strong><p>Даны точки $A(5; -1; 0)$, $B(-2; 7; 1)$, $C(12; -15; -7)$, $D(1; 1; -2)$. Выберем точку A в качестве общего начала и найдем координаты векторов $\vec{AB}$, $\vec{AC}$ и $\vec{AD}$: $\vec{AB} = B - A = (-2-5; 7-(-1); 1-0) = (-7; 8; 1)$ $\vec{AC} = C - A = (12-5; -15-(-1); -7-0) = (7; -14; -7)$ $\vec{AD} = D - A = (1-5; 1-(-1); -2-0) = (-4; 2; -2)$</p><p>Вычислим смешанное произведение: $ (\vec{AB}, \vec{AC}, \vec{AD}) = \begin{vmatrix} -7 & 8 & 1 \\ 7 & -14 & -7 \\ -4 & 2 & -2 \end{vmatrix} $ $ = -7((-14) \cdot (-2) - (-7) \cdot 2) - 8(7 \cdot (-2) - (-7) \cdot (-4)) + 1(7 \cdot 2 - (-14) \cdot (-4)) $ $ = -7(28 + 14) - 8(-14 - 28) + 1(14 - 56) = -7(42) - 8(-42) - 42 = -294 + 336 - 42 = 0 $</p><p>Смешанное произведение равно нулю, следовательно, векторы компланарны, и точки A, B, C и D лежат в одной плоскости.</p><p><strong>Ответ:</strong> да, лежат.</p>"
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            "text" => "<p>Для того чтобы четыре точки лежали в одной плоскости, необходимо и достаточно, чтобы три вектора, построенные на этих точках с общим началом в одной из них, были компланарны. Условием компланарности трех векторов является равенство нулю их смешанного произведения.</p><p>Смешанное произведение векторов $\vec{a}=(x_1, y_1, z_1)$, $\vec{b}=(x_2, y_2, z_2)$ и $\vec{c}=(x_3, y_3, z_3)$ вычисляется как определитель матрицы, составленной из их координат: $ (\vec{a}, \vec{b}, \vec{c}) = \begin{vmatrix} x_1 & y_1 & z_1 \\ x_2 & y_2 & z_2 \\ x_3 & y_3 & z_3 \end{vmatrix} $</p><strong>а)</strong><p>Даны точки $A(-2; -13; 3)$, $B(1; 4; 1)$, $C(-1; -1; -4)$, $D(0; 0; 0)$. Выберем точку D в качестве общего начала и найдем координаты векторов $\vec{DA}$, $\vec{DB}$ и $\vec{DC}$: $\vec{DA} = A - D = (-2-0; -13-0; 3-0) = (-2; -13; 3)$ $\vec{DB} = B - D = (1-0; 4-0; 1-0) = (1; 4; 1)$ $\vec{DC} = C - D = (-1-0; -1-0; -4-0) = (-1; -1; -4)$</p><p>Теперь вычислим смешанное произведение этих векторов: $ (\vec{DA}, \vec{DB}, \vec{DC}) = \begin{vmatrix} -2 & -13 & 3 \\ 1 & 4 & 1 \\ -1 & -1 & -4 \end{vmatrix} $ $ = -2(4 \cdot (-4) - 1 \cdot (-1)) - (-13)(1 \cdot (-4) - 1 \cdot (-1)) + 3(1 \cdot (-1) - 4 \cdot (-1)) $ $ = -2(-16 + 1) + 13(-4 + 1) + 3(-1 + 4) = -2(-15) + 13(-3) + 3(3) = 30 - 39 + 9 = 0 $</p><p>Поскольку смешанное произведение равно нулю, векторы компланарны, а значит, все четыре точки лежат в одной плоскости.</p><p><strong>Ответ:</strong> да, лежат.</p><strong>б)</strong><p>Даны точки $A(0; 1; 0)$, $B(3; 4; -1)$, $C(-2; -3; 0)$, $D(2; 0; 3)$. Выберем точку A в качестве общего начала и найдем координаты векторов $\vec{AB}$, $\vec{AC}$ и $\vec{AD}$: $\vec{AB} = B - A = (3-0; 4-1; -1-0) = (3; 3; -1)$ $\vec{AC} = C - A = (-2-0; -3-1; 0-0) = (-2; -4; 0)$ $\vec{AD} = D - A = (2-0; 0-1; 3-0) = (2; -1; 3)$</p><p>Вычислим смешанное произведение: $ (\vec{AB}, \vec{AC}, \vec{AD}) = \begin{vmatrix} 3 & 3 & -1 \\ -2 & -4 & 0 \\ 2 & -1 & 3 \end{vmatrix} $ $ = 3(-4 \cdot 3 - 0 \cdot (-1)) - 3(-2 \cdot 3 - 0 \cdot 2) + (-1)(-2 \cdot (-1) - (-4) \cdot 2) $ $ = 3(-12) - 3(-6) - 1(2 + 8) = -36 + 18 - 10 = -28 $</p><p>Смешанное произведение не равно нулю ($-28 \neq 0$), следовательно, векторы некомпланарны, и точки A, B, C и D не лежат в одной плоскости.</p><p><strong>Ответ:</strong> нет, не лежат.</p><strong>в)</strong><p>Даны точки $A(5; -1; 0)$, $B(-2; 7; 1)$, $C(12; -15; -7)$, $D(1; 1; -2)$. Выберем точку A в качестве общего начала и найдем координаты векторов $\vec{AB}$, $\vec{AC}$ и $\vec{AD}$: $\vec{AB} = B - A = (-2-5; 7-(-1); 1-0) = (-7; 8; 1)$ $\vec{AC} = C - A = (12-5; -15-(-1); -7-0) = (7; -14; -7)$ $\vec{AD} = D - A = (1-5; 1-(-1); -2-0) = (-4; 2; -2)$</p><p>Вычислим смешанное произведение: $ (\vec{AB}, \vec{AC}, \vec{AD}) = \begin{vmatrix} -7 & 8 & 1 \\ 7 & -14 & -7 \\ -4 & 2 & -2 \end{vmatrix} $ $ = -7((-14) \cdot (-2) - (-7) \cdot 2) - 8(7 \cdot (-2) - (-7) \cdot (-4)) + 1(7 \cdot 2 - (-14) \cdot (-4)) $ $ = -7(28 + 14) - 8(-14 - 28) + 1(14 - 56) = -7(42) - 8(-42) - 42 = -294 + 336 - 42 = 0 $</p><p>Смешанное произведение равно нулю, следовательно, векторы компланарны, и точки A, B, C и D лежат в одной плоскости.</p><p><strong>Ответ:</strong> да, лежат.</p>"
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№659 (с. 169)
Условие. №659 (с. 169)
скриншот условия
Геометрия, 10-11 класс Учебник, авторы: Атанасян Левон Сергеевич, Бутузов Валентин Фёдорович, Кадомцев Сергей Борисович, Позняк Эдуард Генрихович, Киселёва Людмила Сергеевна, издательство Просвещение, Москва, 2019, коричневого цвета, страница 169, номер 659, Условие

659. Лежат ли точки А, В, С и D в одной плоскости, если:

Лежат ли точки А, В, С и D в одной плоскости
Решение 2. №659 (с. 169)
Геометрия, 10-11 класс Учебник, авторы: Атанасян Левон Сергеевич, Бутузов Валентин Фёдорович, Кадомцев Сергей Борисович, Позняк Эдуард Генрихович, Киселёва Людмила Сергеевна, издательство Просвещение, Москва, 2019, коричневого цвета, страница 169, номер 659, Решение 2
Геометрия, 10-11 класс Учебник, авторы: Атанасян Левон Сергеевич, Бутузов Валентин Фёдорович, Кадомцев Сергей Борисович, Позняк Эдуард Генрихович, Киселёва Людмила Сергеевна, издательство Просвещение, Москва, 2019, коричневого цвета, страница 169, номер 659, Решение 2 (продолжение 2)
Решение 3. №659 (с. 169)
Геометрия, 10-11 класс Учебник, авторы: Атанасян Левон Сергеевич, Бутузов Валентин Фёдорович, Кадомцев Сергей Борисович, Позняк Эдуард Генрихович, Киселёва Людмила Сергеевна, издательство Просвещение, Москва, 2019, коричневого цвета, страница 169, номер 659, Решение 3
Геометрия, 10-11 класс Учебник, авторы: Атанасян Левон Сергеевич, Бутузов Валентин Фёдорович, Кадомцев Сергей Борисович, Позняк Эдуард Генрихович, Киселёва Людмила Сергеевна, издательство Просвещение, Москва, 2019, коричневого цвета, страница 169, номер 659, Решение 3 (продолжение 2)
Решение 4. №659 (с. 169)
Геометрия, 10-11 класс Учебник, авторы: Атанасян Левон Сергеевич, Бутузов Валентин Фёдорович, Кадомцев Сергей Борисович, Позняк Эдуард Генрихович, Киселёва Людмила Сергеевна, издательство Просвещение, Москва, 2019, коричневого цвета, страница 169, номер 659, Решение 4
Решение 5. №659 (с. 169)
Решение 6. №659 (с. 169)

Для того чтобы четыре точки лежали в одной плоскости, необходимо и достаточно, чтобы три вектора, построенные на этих точках с общим началом в одной из них, были компланарны. Условием компланарности трех векторов является равенство нулю их смешанного произведения.

Смешанное произведение векторов $\vec{a}=(x_1, y_1, z_1)$, $\vec{b}=(x_2, y_2, z_2)$ и $\vec{c}=(x_3, y_3, z_3)$ вычисляется как определитель матрицы, составленной из их координат: $ (\vec{a}, \vec{b}, \vec{c}) = \begin{vmatrix} x_1 & y_1 & z_1 \\ x_2 & y_2 & z_2 \\ x_3 & y_3 & z_3 \end{vmatrix} $

а)

Даны точки $A(-2; -13; 3)$, $B(1; 4; 1)$, $C(-1; -1; -4)$, $D(0; 0; 0)$. Выберем точку D в качестве общего начала и найдем координаты векторов $\vec{DA}$, $\vec{DB}$ и $\vec{DC}$: $\vec{DA} = A - D = (-2-0; -13-0; 3-0) = (-2; -13; 3)$ $\vec{DB} = B - D = (1-0; 4-0; 1-0) = (1; 4; 1)$ $\vec{DC} = C - D = (-1-0; -1-0; -4-0) = (-1; -1; -4)$

Теперь вычислим смешанное произведение этих векторов: $ (\vec{DA}, \vec{DB}, \vec{DC}) = \begin{vmatrix} -2 & -13 & 3 \\ 1 & 4 & 1 \\ -1 & -1 & -4 \end{vmatrix} $ $ = -2(4 \cdot (-4) - 1 \cdot (-1)) - (-13)(1 \cdot (-4) - 1 \cdot (-1)) + 3(1 \cdot (-1) - 4 \cdot (-1)) $ $ = -2(-16 + 1) + 13(-4 + 1) + 3(-1 + 4) = -2(-15) + 13(-3) + 3(3) = 30 - 39 + 9 = 0 $

Поскольку смешанное произведение равно нулю, векторы компланарны, а значит, все четыре точки лежат в одной плоскости.

Ответ: да, лежат.

б)

Даны точки $A(0; 1; 0)$, $B(3; 4; -1)$, $C(-2; -3; 0)$, $D(2; 0; 3)$. Выберем точку A в качестве общего начала и найдем координаты векторов $\vec{AB}$, $\vec{AC}$ и $\vec{AD}$: $\vec{AB} = B - A = (3-0; 4-1; -1-0) = (3; 3; -1)$ $\vec{AC} = C - A = (-2-0; -3-1; 0-0) = (-2; -4; 0)$ $\vec{AD} = D - A = (2-0; 0-1; 3-0) = (2; -1; 3)$

Вычислим смешанное произведение: $ (\vec{AB}, \vec{AC}, \vec{AD}) = \begin{vmatrix} 3 & 3 & -1 \\ -2 & -4 & 0 \\ 2 & -1 & 3 \end{vmatrix} $ $ = 3(-4 \cdot 3 - 0 \cdot (-1)) - 3(-2 \cdot 3 - 0 \cdot 2) + (-1)(-2 \cdot (-1) - (-4) \cdot 2) $ $ = 3(-12) - 3(-6) - 1(2 + 8) = -36 + 18 - 10 = -28 $

Смешанное произведение не равно нулю ($-28 \neq 0$), следовательно, векторы некомпланарны, и точки A, B, C и D не лежат в одной плоскости.

Ответ: нет, не лежат.

в)

Даны точки $A(5; -1; 0)$, $B(-2; 7; 1)$, $C(12; -15; -7)$, $D(1; 1; -2)$. Выберем точку A в качестве общего начала и найдем координаты векторов $\vec{AB}$, $\vec{AC}$ и $\vec{AD}$: $\vec{AB} = B - A = (-2-5; 7-(-1); 1-0) = (-7; 8; 1)$ $\vec{AC} = C - A = (12-5; -15-(-1); -7-0) = (7; -14; -7)$ $\vec{AD} = D - A = (1-5; 1-(-1); -2-0) = (-4; 2; -2)$

Вычислим смешанное произведение: $ (\vec{AB}, \vec{AC}, \vec{AD}) = \begin{vmatrix} -7 & 8 & 1 \\ 7 & -14 & -7 \\ -4 & 2 & -2 \end{vmatrix} $ $ = -7((-14) \cdot (-2) - (-7) \cdot 2) - 8(7 \cdot (-2) - (-7) \cdot (-4)) + 1(7 \cdot 2 - (-14) \cdot (-4)) $ $ = -7(28 + 14) - 8(-14 - 28) + 1(14 - 56) = -7(42) - 8(-42) - 42 = -294 + 336 - 42 = 0 $

Смешанное произведение равно нулю, следовательно, векторы компланарны, и точки A, B, C и D лежат в одной плоскости.

Ответ: да, лежат.

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