Răspunsuri

2014-10-18T19:06:14+03:00
2014-10-18T19:08:36+03:00
{1,2,3,4,5.... infinit + (-2)}
se tranforma plusul in minus si ramane 2 nr natural
{1,2,3,4,5.... infinit  -2 }
calculam si e egal cu
{1,3,4,5,6 .... infinit}