If \(m\) and \(n\) are integers and \(\dfrac{36}{3^4}=\dfrac1{3^m}+\dfrac1{3^n},\) what is the value of \(m+n?\)

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If \(m\) and \(n\) are integers and \(\dfrac{36}{3^4}=\dfrac1{3^m}+\dfrac1{3^n},\) what is the value of \(m+n?\)

A. -2
B. 0
C. 2
D. 3
E. 5

[spoiler]OA=D[/spoiler]

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