Răspunsuri

2014-10-11T14:20:04+03:00
=4(1+2+3+...+503)/ 2(1+2+3+...+503)
=4* (503*504)/2 /2* (503*504)/2
=2*(503*504)/(503*504)
*parantezele se simplifica astfel incat :
=2
1 5 1