Question

1. Rezolvati Ecuatia
x+2=3
|x+2|=3
2.Aflati elementele multimi A={x€Z daca |x|<3}​

Answer 1

1)

x+2=3

x = 3- 2

x = 1

|x+2| = 3

|x+2| (+) = x+2

x+2=3

x=3-2

x=1

2)

|x|<3

-3<x<3 => A = { -2 ; -1 ; 0 ; 1 ; 2 }