2.1.70 Calculation of Limits
условие: Найти \( \lim _{n \rightarrow \infty} x_{n} \), если \( x_{n} \) равно: \[ \frac{1}{n^{2}} \ sum_ {k = 1}^{n} (-1)^{k} k \]
Calculation of Various Limits, Using L'Hopital's Rule, Remarkable Limits, Power Series, Equivalent Values of Various Other Methods.