1)Submultimile sunt:
{1,3},{1,5},{1,7},
{2,4},{2,6},
{3,5},{3,7},
{4,6},
{5,7}.
In concluzie sunt 9 submultimi.
2)Elementele multimii A sunt:
5*0+7=7
5*1+7=12
5*2+7=17
5*3+7=22
5*4+7=27
5*5+7=32
....
Multimea C={7,12,17,22,27}
Elementele multimii B sunt:
[tex]0^2=0\\
1^2=1\\
2^2=4\\
3^2=9\\
4^2=16\\
5^2=25\\
6^2=36\\
7^2=49\\
8^2=64\\
9^2=81\\
10^2=100\\
11^2=121\\
....[/tex]
Multimea D={36,49,64,81}