limit as x approaches-2 of (x+2)/(x^3+8)

解答

x \to - 2 lim (\frac{x + 2}{x ^{3} + 8})

\frac{1}{12}

十进制

0.08333 \dots

求解步骤

x \to - 2 lim (\frac{x + 2}{x ^{3} + 8})

化简

\frac{x + 2}{x ^{3} + 8} : \frac{1}{x ^{2} - 2 x + 4}

= x \to - 2 lim (\frac{1}{x ^{2} - 2 x + 4})

代入值

x = - 2

= \frac{1}{( - 2 ) ^{2} - 2 ( - 2 ) + 4}

化简

\frac{1}{( - 2 ) ^{2} - 2 ( - 2 ) + 4} : \frac{1}{12}

= \frac{1}{12}

z \to 2 lim (6 z - 1)

7 y^{^{''}} + 2 y^{^{'}} = 0

n = 1 \sum \infty \frac{- 1}{n}

\int_{0}^{2} \frac{x ^{2} - 3}{x + 1} d x

\frac{d}{d x} (\frac{ln ( x )}{2 + ln ( x )})