limit as x approaches-9 of (8x+72)/(|x+9|)

解答

x \to - 9 lim (\frac{8 x + 72}{∣ x + 9 ∣})

发散

求解步骤

x \to - 9 lim (\frac{8 x + 72}{∣ x + 9 ∣})

若

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

则极限不存在

x \to - 9 + lim (\frac{8 x + 72}{∣ x + 9 ∣}) = 8

x \to - 9 - lim (\frac{8 x + 72}{∣ x + 9 ∣}) = - 8

= 发散

in v erse l a pl a ce \frac{( 2 \cdot s )}{s ^{2} + 6 s + 13}

\frac{d}{d θ} ((- 1 + cos (θ)) sin (θ))

\int x^{4} (3 x^{5} + 1)^{9} d x

\frac{d}{d x} (∣ x - 8 ∣)

x \to \infty lim (x^{0})