SOLUTION: How do I find the inverse of f(x) = 2^x?

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Question 399427: How do I find the inverse of f(x) = 2^x?
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
f(x) = 2^x
.
replace f(x) with y:
y = 2^x
flip the variables:
x = 2^y
solve for y:
x = 2^y
take log base two of both sides:
log%282%2Cx%29+=+y
.
therefore, the inverse is:
f%5E-1%28x%29+=+log%282%2Cx%29+