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8/(v5-3) *(v5+3)/(v5+3)=
=8(v5+3)/(5-9)=
=8(v5+3)/-4=
=-2(v5+3)=
=-2v5-6
2)
6/(v7+3) *(v7-3)/(v7-3)=
=6(v7-3)/(7-9)=
=6(v7-3)/-2=
=-3(v7-3)=
=9-3v7
3)
A=<-6,3>
B=(-2,7)
B\A=(3,7)
2)
3)
B/A to przedział, w którym znajduję się wszystkie liczby z B, ale których nie ma w A
B/A = (3,7)