Question

Fungsi f(x) = ax + b, jika f(2) = -2 dan f(-3) = 13, maka nilai f(4) adalah ... .
tolont dibantu yaa:)

Answer 1

F(2) = 2a+b = -2 --> maka b = -2 -2a
f(-3) = -3a+b = 13

di subtitusikan :
-3a + b = 13
-3a-2-2a = 13
-5a-2 = 13
-5a = 13+2
-5a = 15
a = -3

-3a + b = 13
-3 x -3 + b = 13
9 + b = 13
b = 13-9
b = 4

f(4) = ax + b = 3 x 4 + 4 = 12 + 4 = 16

Answer 2

2a+b=-2
-3a+b=13
5a=-15
a=-3

2a+b=-2
2(-3)+b=-2
-6+b=-2
b=-2+6
b=4