Răspuns :
deosebim 2 subsiruri
an=1,2,3, urmatorii 2 termeni vor fi 4 si 5
bn=1·4,2·4,3·4 urmatorii termeni vor fi 4·4=16 si 5·4=20
oOrdonand termenii se obtine
1,4,2,8,3,12,4,16,5,20
an=1,2,3, urmatorii 2 termeni vor fi 4 si 5
bn=1·4,2·4,3·4 urmatorii termeni vor fi 4·4=16 si 5·4=20
oOrdonand termenii se obtine
1,4,2,8,3,12,4,16,5,20