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Oliver
10-26-2013, 05:24 AM
If f(x)=x+4 , g(x)=x^2-2 and h(x)= \sqrt{x}, which of the following is f(g(h(x)))?


(A) x+2

(B) (x+2)^2

(C) (x+4)^2

(D) x+4


Thanks!:):)

nicole
10-26-2013, 05:25 AM
The composition of these three functions is given by

f(g(h(x)))= f(g(\sqrt{x}))= f((\sqrt{x})^2-2)= f(x-2)= x+2

Therefore the correct answer is (A).

Hope these help!!:)

Oliver
10-26-2013, 05:26 AM
Thanks Nicole!!;)