Se da functia f:R->R,f(x) =3/2x-0,5
mai multe detali in poza va rog!

A€Gf <=>f(-1)=-2
3/2×(-1)-5/10=-3/2-5/10=-15/10-5/10=-20/10=-2
deci A apartine Gf
B€Gf<=>f(5)=7
3/2×5-5/10=15/2-5/10=75/10-5/10=70/10=7
deci B apartine Gf