The expression is .

Method 1:-

For any real number b and for any power of negative integer n, .

For any real number b and for any positive integer n, .

                        (Rewrite: )

Method 2:-

       (Rewrite: )

                      (Apply Power of a power property: )

                           (Cancel common terms)

For any real number b and for any power of negative integer n, .

The value of the is .