$\"\"$

\

The matrices are $\"\"$ .

\

The dimension of the two matrices is $\"\"$ .

\

If R and S are inverse then $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

$\"\"$ .

\

The solution is true.

\

$\"\"$ The inverse matrix of $\"\"$ .