Apply the Property of Negative Integer Exponents to rewrite 9^−23 as an expression with positive exponents only.
The property of negative integer exponents states that a number raised to a negative exponent can be rewritten as the reciprocal of the number raised to the positive exponent.
Applying this property to rewrite 9^−23:
9^−23 = 1 / 9^23
Therefore, 9^−23 can be expressed with positive exponents only as 1 / 9^23.