Question

Diketahui suatu fungsi g dengan rumus g(x) = ax - 5.
Nilai fungsi g untuk x = -1 adalah 3.
Nilai g(-3) = ......

A. 19
B. 14
C. -14
D. -32

Answer 1

G(x) = ax - 5
g(-1) = 3

g(-1) = a * -1 - 5
3 = -a - 5
3 + 5 = -a
8 = -a
a = -8

g(-3) = a * -3 - 5
       = -8 * -3 - 5
       = 24 - 5
g(-3) = 19 (A.)

Answer 2

G(x) = ax -5
g (-1) = -a -5
3 = -a-5
a = -5-3
a = -8

g(-3) = -8.(-3) -5
g(-3) = 24-5
g (-3)= 19