If f : R → R is defined by f(x) = 3x + 2, find f(f(x)). - Vidyadip

Question

If f : R → R is defined by f(x) = 3x + 2, find f(f(x)).

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Answer

f(f(x)) = f(3x + 2)
= 3(3x + 2) + 2
= 9x + 6 + 2
= 9x + 8

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