limit as x approaches 4 of (-2x+3)/(x-4)

解答

x \to 4 lim (\frac{- 2 x + 3}{x - 4})

发散

求解步骤

x \to 4 lim (\frac{- 2 x + 3}{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{- 2 x + 3}{x - 4}) = - \infty

x \to 4 - lim (\frac{- 2 x + 3}{x - 4}) = \infty

= 发散

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