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?