dik fungsi f(x)=ax+b jika f(2)=-2 dan f(3)=13 tentukan nilai f(4)

F(2)=2a+b=-2
F(3)=3a+b=13
Dikurang
-a = -15
a=15

2a+b=-2
2(15)+b=-2
30+b=-2
b=-2-30=-32

F(4)=4a+b
=4(15)+(-32)=28