a) f(1)=3 f(2)=5
b) f(0)=-6 f(3)=-5
Diketahui f(x)=ax+b. Tentukan bentuk fungsi fungsi berikut jika
Jawaban:
f(1) = a + b = 3
f(2) = 2a + b = 5
-a = -2
a = 2
a + b = 3
2 + b = 3
b = 3 – 2 = 1
f(x) = 2x + 1
f(0) = 0a + b = -6
f(3) = 3a + b = -5
-3a = -1
a = 1/3
3.1/3 + b = -5
1 + b = -5
b = -5 -1
b = -6
f(x) = 1/3x – 6