Fungsi f(x) = kx + l , k dan l anggota bilangan bulat. Diketahui f (4) = 8 dan f(–1) = 18. Tentukan : a. Nilai k dan l b. Rumus fungsi f TOLONG DIBANTU YG BISA!!! INI HARUS DKUMPULIN BESOK
vhetha
A) f(x) = kx + l f(4) = 4k + l = 8 f(-1) = -k + l = 18 ----------------------(-) 5k = -10 k = -2 -k + l = 18 2 + l = 18 l = 16
f(4) = 4k + l = 8
f(-1) = -k + l = 18
----------------------(-)
5k = -10
k = -2
-k + l = 18
2 + l = 18
l = 16
b) f(x) = kx + l
f(x) = - 2x + 16