Question

Diketahui f(x) = 3x +2
tentukan : a. f(5)
b f(-4)
c. nikai a jika f(a) = 23

Answer 1

A. f(5)= 3(5) + 2= 15 +2= 17
b. f(-4)= 3(-4) +2= -12 +2= -10
c. f(a)= 3a+2= 23
3a= 23-2
3a= 21
a= 21/3
a= 7

Answer 2

A. f(5)
= f(x) = 3x+2
= f(5) = 3.5 +2
= 15 + 2 = 17
b. f(-4)
= f(x) = 3x+2
= f(-4) = 3.-4+2
= -12 + 2 = -10
c. Nilai a jika f(a) = 23
= f(x) = 3x + 2
= 23 = 3.a + 2
= 23-2 = 3a
= 21/3 = a
a = 7

Semoga membantu ;)

Jadikan solusi terbaik ya :D