$\"\"$

\

The augumented matrix is $\"\"$

\

Let $\"\"$

\

The matrix is singular and has no inverse matrix.

\

So,Its determinant is equal to zero.

\

Find the determinant of matrix $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

$\"\"$

\

$\"\"$ .