Discussion
What is the value of \((81)^{-1/4}\) ?
Answer: B
A negative exponent inverts and a fractional one takes a root.
\[ 81^{-1/4} = \frac{1}{81^{1/4}} = \frac{1}{\sqrt[4]{81}} \]
\[ = \frac{1}{3} \]
Since \( 3^{4} = 81 \). Missing the minus sign would give 3.
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