Question

F f(x) = 3x2 + 1 and g(x) = 1 – x, what is the value of (f – g)(2)?

12
14
36
38

Answer 1

(b) 14

Explanation:

You want the difference of functions f(x) = 3x² +1 and g(x) = 1 -x when x=2.

Difference

The notation (f -g)(x) means f(x) -g(x). Then (f -g)(2) is ...

f(2) -g(2) = (3·2² +1) -(1 -2) = 13 -(-1) = 14

The value of (f -g)(2) is 14.