Question

Determinați elementele mulțimii A={x €N| x+2 supra 3 €N,x <16}
Vă rog ​

Answer 1

(x+2)/3∈N=>(x+2)∈M₃

M₃={3,6,9,12,15}

x+2=3=>x=1

x+2=6=>x=4

x+2=9=>x=7

x+2=12=>x=10

x+2=15=>x=13

A={1,4,7,10,13}