P (6,1):
[tex]\left \{ {{2*6+1+1 \geq 0} \atop {6+2*1-7<0}} \right.[/tex]
[tex]\left \{ {{14\geq 0} \atop {1<0}} \right.[/tex] Nie należy
Q (-3,5):
[tex]\left \{ {{2*(-3)+5+1\geq 0} \atop {-3+2*5-7<0}} \right.[/tex]
[tex]\left \{ {{0\geq 0} \atop {0<0}} \right.[/tex] Nie należy
R (8,-3)
[tex]\left \{ {{2*8+(-3)+1\geq 0} \atop {8+2*(-3)-7<0} \right.[/tex]
[tex]\left \{ {{16-3+1\geq 0} \atop {8+(-6)-7<0}} \right.[/tex]
[tex]\left \{ {{20\geq 0} \atop {-5<0}} \right.[/tex] Należy
NIE JESTEM PEWNA
