Question

fie functia f:A→R,unde A={x€Z/|x-1|<3}.

determinati A

Answer 1

|x-1|<3
-3<x-1<3 |+1
-2<x<4
x∈(-2;4)
x∈Z, inseamna ca x∈{-1,0,1,2,3}
Deci A={-1,0,1,2,3}