If $a^{m}$ × $a^{n}$ = $a^{x}$ , then the value of $x$ is _____. (where m and n are natural numbers)

$m n$

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$m + n$

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$m - n$

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$\frac{m}{n}$

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Solution

The correct option is B
$m + n$

According to laws of exponents,
$a^{m} \times a^{n} = a^{m + n}$
$Therefore, x = m + n$

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