Question

Se considera numerele a si b.Comparati cele doua numere, stiind ca: a=-1+2-3+4-...-2011+2012 si b=-2+4-6+8-...-2010+2012.

Answer 1

Atat la a cat si la b, grupam termneii cate doi => a=1+1+1+....1 (1006 termeni) => a=1006. b=2+2+2+....2 (1006:2=503 termeni => b=2×503=1006 = > a=b