If f(x)=x+11 and g(x)=3x^2, find (f+g)(x) and (f+g)(5).
1 answer:
(f+g)(x) = f(x) + g(x) = x + 11 + 3x^2
(f+g)(5) = f(5) + g(5) = 5 + 11 +3(5^2) = 91
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