Question

determinati multimea A={x|x€N si (x-5)|(x+18)}

Answer 1

(x-5) divide (x+18)

x+18=(x-5)=23

(x+18)/(x-5)=(x-5)/(x-5) +23/(x-5)=1+23/(x-5)

Deci (x-5) trebuie sa divida 23

x-5=1, x=6, (x+18)/(x-5)=24/1=24
x-5=23, x=28,(x+18)/(x-5)=46/23=2

A=multimea formata din doua numere: 2 si 24

Answer 2

x(18-5)=x/13=13x Sper ca esre corect