document.write( "Question 763417: f(x) = 2x, then f -1(x) \n" ); document.write( "
Algebra.Com's Answer #464777 by Cromlix(4381)\"\" \"About 
You can put this solution on YOUR website!
f(x) = 2x
\n" ); document.write( "y = 2x
\n" ); document.write( "Change x and y about.
\n" ); document.write( "x = 2y
\n" ); document.write( "2y = x
\n" ); document.write( "Divide both sides by 2
\n" ); document.write( "y = x/2
\n" ); document.write( "f^-1(x) = x/2
\n" ); document.write( "Hope this helps.
\n" ); document.write( ":-) \n" ); document.write( "
\n" );