AJUTORRRRRRRRRRRR DAU COROANĂ

A={x∈ R / - 1 ≤ x ≤ 5}
-1 ≤x ≤5
=> x∈{-1,0,1,2,3,4,5}
=> A={-1,0,1,2,3,4,5}
B={x∈ℤ / |x+4| < 5}
|x+4| < 5
=> - 5 <x+4<5 / - 4
-9<x<1
=> x∈ { - 8,-7,-6,-5,-4,-3,-2,-1,0}
=> B = {-8,-7,-6,-5,-4,-3,-2,-1,0}
A∩B={-1,0}
A∩ℤ = A
SUCCES!