And the even exchange between numbers is.

Obviously, only 432 1 of d is satisfied.

The second problem is to extract 3 in the second column.

The third column is 5.

Is the original determinant multiplied by 15.

The second line and the first line were exchanged once.

Multiply by-1

So it is-15 times of the original determinant value.

That is,-15d chooses b.

The third question, the matrix a is repeated twice at t.

That is, after two transposition, it is equivalent to no transposition.

Obviously, D is correct.

But directly extract constants from determinant or inverse matrix.

This is obviously wrong.