Two functions f and g are defined by (f : x to 3x – 1) and (g : x to 2x^{3}), evaluate (fg(-2)).
-
A.
-49 -
B.
-47 -
C.
-10 -
D.
-9
Correct Answer: Option A
Explanation
(g : x to 2x^{3})
(g(-2) = 2(-2^{3}) = 2(-8) = -16)
(f : x to 3x – 1)
(f(-16) = 3(-16) -1 = -48 – 1 = – 49)