If $a^{3} = b^{21}$ , find the value of $a$ .

b^{7}

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b^{18}

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b^{24}

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b^{9}

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Solution

The correct option is A $b^{7}$
$a^{3} = b^{21}$
$⟹ a = {(b^{21})}^{\frac{1}{3}} = b^{7}$

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