2.1.64 Calculation of Limits
Условие: Вычислить предел функции двух переменных: \[ \lim _{\substack{x \rightarrow 0 \\ y \rightarrow 0}} \frac{x^{2}-2 y^{2}}{x^{2}+y^{2}} \]
Calculation of Various Limits, Using L'Hopital's Rule, Remarkable Limits, Power Series, Equivalent Values of Various Other Methods.