Fungsi f didefinisikan dengan rumus f(x)= ax + b jika f(2)=1 dan f(4)=7maka nilai a+2b=

Langsung aja y

f(2) = 2a + b = 1
f(4) = 4a + b = 7
_____________-
-2b = -6
b = 3

2a + b = 1
2a = 1 - 3
2a = -2
a = -1

= a + 2b
= -1 + 2(3)
= -1 + 6
= 5

Semoga berguna +_+