3. Functions
Function Composition
Multiple Choice
Multiple ChoiceGiven the functions f(x)=x2−21 and g(x)=x+2 find (f∘g)(x) and (g∘f)(x).
A
(f∘g)(x)=x1 ; (g∘f)(x)=x2−22x2−3
B
(f∘g)(x)=x1 ; (g∘f)(x)=x2−23
C
(f∘g)(x)=x ; (g∘f)(x)=x2−2
D
(f∘g)(x)=x ; (g∘f)(x)=x+2−21
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