SAT Subject Test Mathematics Level 2

(A) All real    numbers except  4

(B) All real    numbers except  −2  and 2

(C) All real    numbers greater than    or  equal   to  −2  and less    than    or  equal   to  2

(D) All real    numbers less    than    or  equal   to  −2  or  greater than    or  equal   to  2

(E) All real    numbers less    than    or  equal   to  −2  or  greater than    or  equal   to  2,  except  4

6 . If , then f−1 (x)=

(A)

(B)

(C)

(D) 3 x −3

(E) 3 x −9