Fungsi f didefinisikan dengan rumus f(x)= px+q. jika f(3)=-10 dan f(-2)=0, tentukan nilai f(-7)!
Jawaban Terkonfirmasi
F(3) = -10
3p + q = -10
f(-2) = 0
-2p + q = 0
3p + q = -10
-2p + q = 0 -
———————
5p = -10
p = -10 : 5
p = -2
-2p + q = 0
-2 × (-2) + q = 0
4 + q = 0
q = -4
f(x) = -2x – 4
f(-7) = -2 × (-7) – 4
f(-7) = 14 – 4
f(-7) = 10
Jawaban Terkonfirmasi
F(x) = px + q
f(3) = p(3) + q = -10 f(-2) = p(-2) + q = 0
= 3p + q = -10 = -2p + q = 0
3p + q = -10 3(-2) + q = -10
-2p + q = 0 Dikurangi -6 + q = -10
q = -4
5p = -10
p = -2
Jadiiiiiii f(-7) = -2(-7) + (-4)
= 14 – 4
= 10