document.write( "Question 425516: if there a function g that satifies f o g = g o f = f for all funtions? If so, what is it? \n" ); document.write( "

Algebra.Com's Answer #296390 by richard1234(7193) $\"\"$ $\"About$

You can put this solution on YOUR website!
If g(f(x)) = f(x) for all x, we can conclude that g(x) leaves x unchanged, so g(x) = x. \n" ); document.write( "

\n" );