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maka a. F o F (X) = f(f(x))
= f ( 3/x )
= 3/3/x
= 3/1 x X/3
= 3x/3
b. g o g (x) = g (g(x))
= g ( x^2 - 4)
= x^2 - 4 - 4
= x^2 - 8