Question 6
FunctionsTwo functions f and g are defined by f : x → 3x − 1 and g : x → 2x3, evaluate fg(−2)
- A.−49
- B.−47
- C.−10
- D.−9
Show the answer and explanation
Answer: A (−49)
Explanation
First g(−2) = 2(−8) = −16, then f(−16) = 3(−16) − 1 = −49.
Two functions f and g are defined by f : x → 3x − 1 and g : x → 2x3, evaluate fg(−2)
Answer: A (−49)
First g(−2) = 2(−8) = −16, then f(−16) = 3(−16) − 1 = −49.