Question

Va rog ajutați-ma
A={X e Z//2x-1/<3 }

Answer 1

A={X e Z/ | 2x-1| <3 }

| 2x-1| <3  ⇔ -3 < 2x-1 < 3  |+1
                     -2 < 2x <4 | · 1/2
                     -1 < x < 2 
                    x ∈ Z
=> A={0,1}