limit as x approaches-4 of (|x+4|)/(x+4)

解答

x \to - 4 lim (\frac{∣ x + 4 ∣}{x + 4})

发散

求解步骤

x \to - 4 lim (\frac{∣ x + 4 ∣}{x + 4})

若

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

则极限不存在

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

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

= 发散

d er i v a t i v e y = (e^{4 x} - 3)^{8}

\frac{d ^{3}}{d x ^{3}} (2 x^{3} - 4 x^{2} + 2)

a re a x^{3} - 5 x, 4 x

\frac{d}{d x} (\frac{7}{x + 4})

d x - e^{3 x} d y = 0