matrices and determinents

Question

find the inverse of matrix

A=[4   -2   1]

     [7   3    3 ]

     [2   0    1 ]

note -all the no.s are in the same bracket.

Answer 1

Given matrix is

 

is exist.

Comments

Check your solution

Answer 2

To find inverse Adjoint method

The matrix is

Find cofactor matrix for A.