Gengs mohon bantuannya. Diketahui suatu fungsi f(x)= ax + b; f(1) = 2 dan f(3) = 10 maka f(2) =

f(x) = ax + b

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

f(3) = a(3) + b
10 = 3a + b...(2)

3a + b = 10
a + b = 2
________ _
2a = 8
a = 8/2
a = 4

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

f(2)
= a(2) + b
= 4(2) + (-2)
= 8 - 2
= 6