If f(x)=|3x−1|, compute all values of x for which f(f(x))=x. Enter all the solutions, separated by commas.
|9x-4|=x
so 9x -4 = +x x = 1/2
or 9x-4 = -x x = 2/5
You have found two of the possibilities EP.
Thanx, Alan ! I see what I did incorrectly now.