Let the matrix be $\"\"$ .

Dimension of $\"\"$ is $\"\"$ .

Form the matrix $\"\"$ .

$\"\"$

Use row operations to transform $\"\"$ into reduced row echelon form.

$\"\"$

The second row contains all zeros to the left of the vertical bar in above reduced form.

So $\"\"$ is singular matrix and it has no inverse.

Check:

$\"\"$ .

Since $\"\"$ , $\"\"$ has no inverse.

The matrix $\"\"$ has no inverse.