Question

A={x apartine Z* | | 2x-1|(7-|2x+1|>0}

Answer 1

|2x-1|>0, pentru orice x din Z
Se impune conditia 
7-|2x-1|>0
|2x-1|<7
-7<2x-1<7
-6<2x<8
-3<x<4
A={-2,-1,0,1,2,3}