Question

Fie functia F(x)=mx+n 
a) determinati A(1,3)
                    B(2, 4)   apartin Gf

Answer 1

A∈$G_{f}$ ⇒ 3=m+n
B∈$G_{f}$ ⇒ 4=2m+n
$\left \{ {{m+n=3} \atop {2m+n=4}} \right.$
[tex] \left \{ {{-2m-2n=-6} \atop {2m+n=4}} \right. \\ -n=-2 \\ n=2 \\ m=3-n \\ =3-2 \\ =1 \\ ⇒$f x=x+2$