Diketahui f(x) = 2x – 9, tentukan: a. f(2) b. f(-3) c. f(4) d. f(½) e. f(-½)

JAWAB :
Rumus : f(x) = 2x – 9
a. f(x) = 2x – 9
f(2) = 2(2) – 9
f(2) = -5

b. f(-3) = 2(-3) – 9
f(-3) = -15

c. f(4) = 2(4) – 9
f(4) = 1

d. f(1/2) = 2(1/2) – 9
f(1/2) = -8

e. f(-1/2) = 2(-1/2) – 9
f(-1/2) = -10