Question

Aflati elementele multimilor A={x/x=5 x n+7,n apartine numerelor nat} si B={y/y=n^2,n apartine numerelor nat}

Answer 1

n poate lua valori de la 0,1,2,3,4,5...
n=0⇒x=5·0+7=7
n=1⇒x=5·1+7=12
n=2⇒x=5·2+7=17
n=3⇒x=22
n=4⇒x=27
n=5⇒x=32.......

A={7,12,17,22,27,32,37,......}

n=0⇒y=0
n=1⇒y=1²=1
n=2⇒y=2²=4
n=3⇒y=9
n=4⇒y=16.....

B={0,1,4,9,16,25,36,49,64,81,100...}