The power 9 squared is equivalent to 81 What is the value of 9 to the negative 2 power ?
Answer
A
negative 9
B
1 ninth
C
negative 81
D
1 over 81
Explanation
A negative exponent means take the reciprocal of the corresponding positive power: 9⁻² = 1 ÷ 9². Since 9² = 81, 9⁻² = 1/81, so the correct choice is 1 over 81.
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