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Verified Answer :

\(\bf 4^3-4^{-6}\implies 4^{3-6}\implies 4^{-3}\\\\ -----------------------------\\\\ now\quad recall\implies a^{-{ n}} \implies \cfrac{1}{a^{ n}}\qquad \qquad \cfrac{1}{a^{ n}}\implies a^{-{ n}}\\\\ -----------------------------\\\\ 4^{-3}\implies \cfrac{1}{4^3}\implies \cfrac{1}{64}\)

Answer:

1/64

Step-by-step explanation:

i got this on usatestprep.

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