Functions Follow-Up Test
8 Minutes — 6 Questions
Directions
Solve problems 1−6. Select the best answer choice for each question.
1 . If f(x) = x^2 + 2 x − 2 and if f(s − 1) = 1, what is the smallest possible value of s?
(A) − 3
(B) − 2
(C) − 1
(D) 1
(E) 2
2 . If f(x) = 2x^3 and g(x) = 3x, what is the value of g(f(−2)) − f(g(−2))?
(A) −480
(B) −384
(C) 0
(D) 384
(E) 480
3 . For what value of x is |16 – (x + 5)^2 | at its minimum?