Răspunsuri

2014-11-16T21:15:57+02:00
X(1+2+...+29)=1+2+..+600
x(29*30)/2=600*601/2
435x=180300
x=414.48
Cel mai inteligent răspuns!
2014-11-16T21:24:09+02:00
X(1+2+3+.........+29)=1+2+3+4+............+600
1+2+3+...........+29=29 x 30:2=870:2=435
1+2+........+600=600 x 601:2=360 600:2=180 300
X x 435=180 300
X=414,4