Question

For f(x) = 2x + 3 and g(x) = x2 – 8, find (f + g)(x)
A. x2 + 2x + 11
B. 2x2 – 5
C. 2x3 – 48
D. x2 + 2x – 5

Answer 1

Remark

(f + g)(x) means f(x) + g(x). (f + g)(x) is the sum of two functions.

Solve

f(x) + g(x) = (2x + 3) + x^2 - 8

f(x) + g(x) = x^2 + 2x - 5

Answer

D