Question

1. determinati elementele multimii A={x€z|2/x+1€z}​

Answer 1

Răspuns:

X+1|2

X+1(D2={-2,-1,1,2}

X+1=-1 x=-2

X+1=-2 x=-3

X+1=1 x=0

x+1=2 x=1

A={-3,-2,0,1}