For , which of the following is equal to…

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Problem

For a≠0a\neq0, which of the following is equal to a−5a^{-5}? (a) −1a5-\dfrac{1}{a^{5}} (b) (−a)5(-a)^{5} (c) 1a5\dfrac{1}{a^{5}} (d) a5a^{5}

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