Răspunsuri

2014-01-19T15:17:39+02:00
1*2+2*3+...+2013*2014=t
 \frac{t}{4t}= \frac{1}{4}
=> x^{2} =4
=>x=2
N-am inteles nimic :|
mersi oricum
a gata , scuze nu imi aparuse
Cel mai inteligent răspuns!
2014-01-19T15:24:16+02:00