fungsi f ditentukan dg rumus f(x)=ax+b. jika f(2)=-4, dan f(-2)=8, maka nilai a dan b berturut turut adah

f(x) = ax + b
f(2) = -4
-4 = a(2) + b
-4 = 2a + b

f(-2) = 8
8 = a(-2) + b
8 = -2a + b

eliminasikan
2a + b = -4
-2a + b = 8
---------------- -
4a = -12
a = -3

2a + b = -4
2(-3) + b = -4
-6 + b = -4
b = 2

Nilai a = -3
Nilai b = 2