limit as x approaches 0+of-1/(x^2)

解答

x \to 0 + lim (- \frac{1}{x ^{2}})

- \infty

求解步骤

x \to 0 + lim (- \frac{1}{x ^{2}})

x \to a lim [c \cdot f (x)] = c \cdot x \to a lim f (x)

= - x \to 0 + lim (\frac{1}{x ^{2}})

x

从右侧趋近于

0, x > 0 \Rightarrow x^{2} > 0

分母从右侧趋近于 0，为正值

= - \infty

y^{^{''}} - 5 y^{^{'}} + 9 y = x e^{x}

\frac{d}{d x} ((x^{2} - 2 x - 1)^{\frac{2}{3}})

\int tan^{5} (x) d x

(x + y) e^{\frac{x}{y}} d x + (x - \frac{x ^{2}}{y}) e^{\frac{x}{y}} d y = 0

\int (5 x^{14} - 2 x^{5}) d x