Answer :
To find: f{f(x)}
Formula used: (i) f o f = f(f(x))
Given: (i) f : R → R : f(x) = 3x + 2
We have,
f{f(x)} = f(f(x)) = f(3x + 2)
f o f =3(3x + 2) + 2
= 9x + 6 + 2
= 9x + 8
Ans) f{f(x)} = 9x + 8
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