Question

A={x|x apartine Z,|x|<4} si B={x|x apartine Z,-2 < x<5} completati:
a=
b=
A reuniune B=
A intersectie B=
a-b=
b-a=

Answer 1

IxI<4=>x apartine {-3,-2,-1,0,-1,2, 3}=> A={-3,-2, -1, 0, 1, 2, 3}
-2<x<5=>x apartine {-1, 0,1, 2, 3, 4}=> B={-1, 0, 1, 2, 3, 4}
A reunit cu B={-3, -2, -1, 0, 1, 2, 3, 4}
A intersectat cu B={-1, 0, 1, 2, 3}
A-B={-3, -2}
B-A={4}