Răspunsuri

Cel mai inteligent răspuns!
2014-11-19T10:30:41+02:00
X+1+x+2+....+x+41=40x+860
41x+1+2+....41=40x+860
41x+41x42/2=40x+860
41x+41x21=40x+860
41x-40x=860-861
x=-1
marcheaza-l daca e cel mi bun.multumesc!
Iti multumesc mult :)