Răspuns:
3. 11-m=11-1/m
11m-m=10
10m=1
4. a)
f(-1)=3
f(-1)=-(-1)+2
=1+2
=3 => A(-1,3) € Gf
f(1)=1
f(1)=-1+2
=1 => B(1,1) € Gf