fo f(x)= ||x|| = +x or -x
Given that f(x) = |x| and g(x) = 7x - 8
Therefore, if f(x) = |x| and g(x) = 7x - 8
then fo g(x) = f(g(x)) = f(7x+8) = |7x+8|
in the above case x is replaced by 7x+8
in the same way go f(x)= g(f(x)) = g(|x|) = 7|x|+8
and go g(x) = 49x-64
so fo f(x) = f(f(x)) = f(|x|) = ||x|| = +x or -x
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