Question

F(x)=ax+b
Jika f(1)=3 dan f(2)=5
Brp fungsinya?

Answer 1

F(x) = ax+b
f(1)= a + b = 3
f(2)= 2a+b = 5
eliminasikan :
-a = -2
a= 2
substitusikan
a+b=3
2+b=3
b=3-2
b=1
maka f(x)= ax+b
f(x) = 2x+1