Diketahui f(x)=px+q.f(-1)=-5 dan f(4)=5 nilai f(-6) adalAH….
F(x)=px+q
f(-1)=-1p+q=-5
f(4) = 4p+q=5
————— –
-5p=-10
p=2
4p+q=5
8+q=5
q=-3
jadi f(-6)=-6(2)+(-3)
=-12-3
=-15
-1p + q = -5
4p + q = 5
___________-
-5p = -10
p = 2
4 ×2 + q = 5
8 + q = 5
q = -3
f(-6)= -6 × 2 + (-3)
= -15