Question

If f(x) = - 4x and g(x)= 5x?, find
a. (f+g)(x)
b.(-9)(x)
C. (fog)(x)

Answer 1

a) (f+g)(x) = f(x) + g(x) = -4x + 5x = x

b) -9(x) = -9x? I have no idea what this means.

c) (f o g)(x) = (f(g(x)) = f(5x) = -4 (5x) = -20x