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How do you simplify #5^-3#?

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1 Answer

Jan 3, 2017

Use the exponent rule: #x^color(red)(a) = 1/x^color(red)(-a)#

#5^color(red)(-3) = 1/5^color(red)(- -3) = 1/5^color(red)(3) = 1/(5 xx 5 xx 5) = 1/125 = 0.008#

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