limit as x approaches 1 of-2/(x^2-1)

解答

x \to 1 lim (- \frac{2}{x ^{2} - 1})

发散

求解步骤

x \to 1 lim (- \frac{2}{x ^{2} - 1})

若

x \to a^{-} lim f (x) \neq = x \to a^{+} lim f (x)

则极限不存在

x \to 1 + lim (- \frac{2}{x ^{2} - 1}) = - \infty

x \to 1 - lim (- \frac{2}{x ^{2} - 1}) = \infty

= 发散

\frac{\partial}{\partial x} (\frac{x ^{2}}{x ^{2} - 1})

t an g e n t f (x) = 4 x, at x = 1

\frac{\partial}{\partial x} (2 x^{2} - 16 x + y^{2} + 1)

\frac{\partial}{\partial x} (e^{t} x + 1)

d er i v a t i v e y = 4 e^{x} + \frac{4}{3 x}