Dato l'insieme
[math]A={x in N|X
determina
a) i numeri pari P={0,2,4,6,8,10,12,14,16,18,20,22,24,26,28}
[math]P={X in A|\text{x e' pari}}[/math]
b) i numeri dispari D={1,3,5,7,9,12,15,17,19,21,23,25,27,29}
[math]P={X in A|\text{x e' dispari}}[/math]
c) i multipli di 5 C={0,5,10,15,20,25}
[math]P={Xin A/X=5n}[/math]
oppure [math]P={X in A|\text{x e' multiplo di 5}}[/math]
