Question

if f(x) = 3x + 2 and g(x) = x^2 + 1, which expression is equivalent to ( f of g)(x)?

(3x + 2)(x^2 + 1)
3x^2 + 1 + 2
(3x + 2)^2 + 1
3(x^2 + 1) + 2

Answer 1

f(g(x)=f(x^2+1)=3(x^2+1)+2

Answer 2

thanks!