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2014-07-10T20:21:41+03:00
 \frac{2}{n} -1<[ \frac{2}{n} ]$\leq \frac{2}{n}| \cdot  \frac{n}{3} => \frac{2-n}{3} < \frac{n}{3} \cdot [ \frac{2}{n} ]$\leq \frac{2}{3}
Trecand la limita in inegalitatile anterioare obtinem valorea limitei  \frac{2}{3} .