Question

The domain for f(x) and g(x) is the set of all real numbers.

Let f(x) = x2 + 1 and g(x) = 3x.


Find f − g.


A.
x2 + 3x + 1


B.
x2 + 3x


C.
3x3 + 3x + 1


D.
x2 − 3x + 1

Answer 1

D

Explanation:

(f-g)(x) = x^2+1-3x= x^2-3x+1