Let | a | = 2, | B | = 3, find the inverse matrix of | - 2 (the transfer matrix of a and your matrix of B)|

Let | a | = 2, | B | = 3, find the inverse matrix of | - 2 (the transfer matrix of a and your matrix of B)|

|-The inverse matrix of 2 (A's transfer to B's you matrix)|
=The third power of (- 2) × 1 / | a ^ TB ^ (- 1)|
=-8/(2×1/3)
=-12

A is the determinant of transpose multiplication of 4 * 3 matrix A and a

Because R (AA ^ t)

It is known that the matrix A is a quantitative matrix of order 3, and the value of its determinant is 1.27. Find the inverse matrix of A

The inverse matrix of a is:
（3 0 0
0 3 0
0 0 3）