Suatu fungsi dirumuskan f(x) = ax+b. Jika f(2) = 5 dan f(-1) = -4, nilai f(0) + f(1) +f(2) adalah ???

Jika f(2) = 5
5 = 2a + b ... 1

Jika f(-1) = -4
-4 = -a + b ... 2

1 - 2
9 = 3a
a = 3

Sub a = 3 ke 1
5 = 6 + b
b = -1

f(x) = 3x -1
f(2) sudah diketahui
f(0) = -1
f(1) = 2

f(0) + f(1) +f(2) = -1+2+5 = 6