document.write( "Question 1013136: find the inverse of f(x)=2^x+1 \n" ); document.write( "

Algebra.Com's Answer #629318 by fractalier(6550) $\"\"$ $\"About$

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\n" ); document.write( "f(x)=2^x+1
\n" ); document.write( "y = 2^x + 1
\n" ); document.write( "x = 2^y + 1
\n" ); document.write( "x - 1 = 2^y
\n" ); document.write( "log(x-1) = log 2^y
\n" ); document.write( "log(x-1) = y log 2
\n" ); document.write( "y = log(x-1) / log 2
\n" ); document.write( "f^(-1)(x) = log(x-1) / log 2 \n" ); document.write( "

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