Question

exercitiul 2 urgent va rog

Answer 1

|2x-1|≤3
-3≤2x-2≤3 /+1
-2≤2x≤4 /:2
-1≤x≤2
x∈Z ⇒x∈{-1,0,1,2,3,4}
-1≤2-x≤5 /-2
-3≤-x≤3 /·(-1)
3≥x≥-3 ⇔ -3≤x≤3
x∈N* ⇒ x∈{1,2,3}
A∩B={1,2,3}