Question

Question at position 5
5

Multiple Choice
2 points



Question at position 5

For f(x) = 2x + 1 and g(x) = x2 – 7, find (f – g)(x).


2x2 – 15


–x2 + 2x + 8


–x2 + 2x – 6


x2 – 2x – 8


Question at position 6
6

Multiple Choice
2 points



Question at position 6

If f(x) = 2x2 + 1 and g(x) = x2 – 7, find (f + g)(x).


x2 – 6


3x2 – 6


x2 + 8


3x2 + 8

Answer 1

5) (f − g)(x) = (2x + 1) − (x^2 − 7) = −x^2 + 2x + 8.

6) (f + g)(x) = (2x^2 + 1) + (x^2 − 7) = 3x^2 − 6.