19 . If f(x) = 3x−2, f(2) =
(A)(B)
(C)
(D) 12
(E) 36
20 . If i^2 = −1, what is the value of 3i^2 + i^3 −
i^4?(A) −4 − i
(B) −2 − i
(C) 2 + i
(D) 4 + i
(E) 6 + 2i21 . An operation & is defined for all real numbers c and d by the equation
If 6 & d = 1.7, what is the value of d?(A) −5
(B) −2