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Understanding the Meaning of Negative Exponents

ALGEBR-W55S14

Which of these is equivalent to ${ x }^{ -5 }$?

A

$-{ x }^{ 5 }$

B

$-\cfrac { 1 }{ { x }^{ 5 } }$

C

$\cfrac { 1 }{ { x }^{ 5 } }$

D

None of these are equivalent to ${ x }^{ -5 }$. It cannot be simplified any further.