document.write( "Question 668382: Find the inverse of f(x)=2^x. Here is where I went with this. Change f(x) to y so it would read y=2^x. Interchange the y and x to get x=2^y. I don't know how to write this on here, but you would take the y square root of x and the y square root of 2^y to get y square root of x=2. This is where I get stuck. Thanks! \n" ); document.write( "

Algebra.Com's Answer #415501 by Alan3354(69443) $\"\"$ $\"About$

You can put this solution on YOUR website!
Find the inverse of f(x)=2^x. Here is where I went with this. Change f(x) to y so it would read y=2^x. Interchange the y and x to get x=2^y.
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\n" ); document.write( "x=2^y
\n" ); document.write( "ln(x) = y*ln(2)
\n" ); document.write( "y = ln(x)/ln(2)
\n" ); document.write( "Or $\"y+=+log%282%2Cx%29\"$
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