Предмет: Математика, автор: nakonechnyy

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Автор ответа: dnepr1
0

Дано решение по методу Крамера.

К сожалению, форматирование с программы Эксель не сохраняется.

x y z B        

2 1 -3 6                           2 1 -3 2 1

1 3 1 -2 Определитель Δ   1 3 1 1 3

1 -4 2 4  40                         1 -4 2 1 -4

Заменяем 1-й столбец на вектор результатов B:        12 1 12

6 1 -3      -9 -8 2 40

-2 3 1  Определитель Δ1   6 1 -3 6 1

4 -4 2   80 -2 3 1 -2 3

Заменяем 2-й столбец на вектор результатов B:      4 -4 2 4 -4

2 6 -3      36 4 -24

1 -2 1  Определитель Δ2     -36 -24 -4 80

1 4 2   -40 2 6 -3 2 6

Заменяем 3-й столбец на вектор результатов B:      1 -2 1 1 -2

2 1 6    1 4 2 1 4

1 3 -2  Определитель Δ3     -8 6 -12

1 -4 4   -40   6 8 12 -40

x = 80 40 2   2 1 6 2 1

y = -40 40 -1   1 3 -2 1 3

z = -40 40 -1   1 -4 4 1 -4

       24 -2 -24

       18 16 4 -40

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