Răspunsuri

Cel mai inteligent răspuns!
2014-11-06T10:41:34+02:00
A) 1+3+5+7+...+2013-(2+4+6+...+2012)
     1+(3-2)+(5-4)+...+(2013-2012) =
      1x2013=2013

b) 1+2+3+4+...+1000+(1001-1001)+(1002-1002)+(2013-2012)=
1+2+3+4+...+1000+1=
1000x1001:2 +1=
500 x 1001 + 1 =500501
2014-11-06T10:42:11+02:00
Pai factor comun nu ai cum s dai....cred ca aplicam formula lui Gauss