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Консультация № 200241
08.02.2021, 16:10
0.00 руб.
1
1
1
Здравствуйте! Прошу помощи в следующем вопросе:
Найти матрицы [АВ], [ВА], [А^-1], если [A]=
[1 0 3]
[3 1 7]
[2 1 8]
,
[B]=
[3 5 4]
[-3 0 1]
[5 6 -4]
Найти матрицы [АВ], [ВА], [А^-1], если [A]=
[1 0 3]
[3 1 7]
[2 1 8]
,
[B]=
[3 5 4]
[-3 0 1]
[5 6 -4]
Прикрепленные файлы:
Обсуждение
09.02.2021, 19:56
общий
это ответ
Здравствуйте, ALX5!
Задача рутинная, связанная с большим количеством элементарных арифметических действий.
Общая формула вычисления для матриц 3 порядка:
Для примера:
Вычисления для остальных элементов надеюсь нетрудно выписать самому. В результате:
Аналогично:
Для нахождения обратной матрицы методика вычислений:
Как найти обратную матрицу?
Как вычислить определитель?
и пересказывать её не вижу смысла.
Матрица дополнений:
Определитель матрицы:
Проверка:
Задача рутинная, связанная с большим количеством элементарных арифметических действий.
Общая формула вычисления для матриц 3 порядка:
Для примера:
Вычисления для остальных элементов надеюсь нетрудно выписать самому. В результате:
Аналогично:
Для нахождения обратной матрицы методика вычислений:
Как найти обратную матрицу?
Как вычислить определитель?
и пересказывать её не вижу смысла.
Матрица дополнений:
Определитель матрицы:
Проверка:
Об авторе:
Понеже не словес красных бог слушает, но дел наших хощет
Понеже не словес красных бог слушает, но дел наших хощет
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