H
hpthao_99


Tính hợp lí:
[TEX]\frac{1}{100}.99 - \frac{1}{99}.98 - \frac{1}{98}.97 - ... - \frac{1}{3}.2 - \frac{1}{2}.1 [/TEX]
[TEX]\frac{1}{100}.99 - \frac{1}{99}.98 - \frac{1}{98}.97 - ... - \frac{1}{3}.2 - \frac{1}{2}.1 [/TEX]