Current location - Training Enrollment Network - Mathematics courses - Determinant of higher mathematics. I'm reviewing urgently at the end of the term. The answer is best written on paper. The great god handed in the method by the way.
Determinant of higher mathematics. I'm reviewing urgently at the end of the term. The answer is best written on paper. The great god handed in the method by the way.
2 - 1 1 -2

4 0 - 1 4

- 1 2 1 0

-4 2 - 1 4

In line 2, line 3 and line 4, add lines 1 ×-2, 1/2, 2.

2 - 1 1 -2

0 2 -3 8

0 32 32 - 1

0 0 1 0

In line 3, add line 2 ×-3/4.

2 - 1 1 -2

0 2 -3 8

0 0 154 -7

0 0 1 0

Line 3 Exchange Line 4-

2 - 1 1 -2

0 2 -3 8

0 0 1 0

0 0 154 -7

In the fourth line, add the third line ×- 15/4-

2 - 1 1 -2

0 2 -3 8

0 0 1 0

0 0 0 -7

Multiply the main diagonal by 28.