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Given the function f(x) = 3x, find the value of f−1(81).
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Given the function f(x) = 3x, find the value of f−1(81).

User Vndpal
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f^(-1)(81) is asking for what number x will the function
f(x)=3x will produce 81.

3x = 81
x = 27
User Detect
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