Răspuns :
A={x∈Z | -3<x+5≤3}
-3<x+5≤3 /-5
-8<x≤ -2
A={-7,-6,-5,-4,-3,-2}
B={x∈Z | -6≤x< -2}
B={-6,-5,-4,-3}
a) -5∈A (A)
b) A⊂B (F)
c) ∅⊂B (F)
d) {-1,0,1}⊃A (F)
A={x∈Z | -3<x+5≤3}
-3<x+5≤3 /-5
-8<x≤ -2
A={-7,-6,-5,-4,-3,-2}
B={x∈Z | -6≤x< -2}
B={-6,-5,-4,-3}
a) -5∈A (A)
b) A⊂B (F)
c) ∅⊂B (F)
d) {-1,0,1}⊃A (F)