For the given functions f and g, find the requested function and state its domain.f(x) = 16 - x2; g(x) = 4 - xFind f + g.
A. (f + g)(x) = -x2 + x + 12; all real numbers
B. (f + g)(x) = 4 + x; {x|x ? -4}
C. (f + g)(x) = x3 - 4x2 - 16x + 64; all real numbers
D. (f + g)(x) = -x2 - x + 20; {x|x ? 4, x ? -5}
Answer: D
Mathematics
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