Question

If ƒ(x) = 15x + 7 and g(x) = x2 – 5x, find (ƒ + g)(x).

A. (ƒ + g)(x) = x2 + 10x +7
B. (ƒ + g)(x) = 15x2 – 75x +7
C. (ƒ + g)(x) = 15x + g + 7
D. (ƒ + g)(x) = 15x3 – 68x2 – 35x

Answer 1

x² + 10 x + 7 → A

(f + g)(x) = f(x) + g(x) = 15x + 7 + x² - 5x = x² + 10x + 7