#### Answer

$M=N$

#### Work Step by Step

If $a^m$ is equal to $a^n$, then, since they have the same base, their exponents must be equal.
Thus,
If $a^m=a^n$, then $m=n$.
Therefore, the missing expression in the given statement is:
$M=N$

Published by
Pearson

ISBN 10:
0-13417-894-7

ISBN 13:
978-0-13417-894-3

$M=N$

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