$3^{- 3}$ can also be expressed as

\frac{1}{27}

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\frac{- 1}{27}

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27

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- 27

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None of these

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Solution

The correct option is A $\frac{1}{27}$
$a^{- b}$ is expressed as: $\frac{1}{a^{b}}$
In the same manner,
$3^{- 3}$ can be expressed as: $\frac{1}{3^{3}} = \frac{1}{27}$

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