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If f(x) = 3x2 and g(x) = x+2, find (f•g)(x).

1 Answer

6 votes

Since you have provided me with • symbol I must assume it's about function multiplication, but since standard keyboard doesn't have the function composition symbol
\circ I must assume you meant either.

1. Case you meant multiplication.


(f\cdot g)(x)=3x^2\cdot(x+2)=\boxed{3x^3+6x^2}

2. Case you meant composition.


(f\circ g)(x)=f(g(x))=f(x+2)=3(x+2)^2=\boxed{3x^2+12x+12}

Hope this helps. Next time please use LaTeX to format your equations so that others can give you answers as well.

User Ganesshkumar
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