Let f(x)=2x-3 For what value of x is (f(f(x)) = x?
\(f(x)=2x-3\\ so\\ f(f(x))=2(2x-3)-3\\ \text{so when does}\\ 2(2x-3)-3=x \)
well you will have to solve it to find out ;)
The Answer is 3!
Thank You!
