Question

Given f(x)=2x+5; g(x)=3x2, what is equal to (f o g) (x)?

Answer 1

fog(x) = f [g(x)]

f[ 3x^2] = 2(3x^2) + 5

= 6x ^2 + 5

(fog) (x) = 6x^2 + 5

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