limit as x approaches+(-5) of 3x-|x+5|

解答

x \to + (- 5) lim (3 x - ∣ x + 5 ∣)

- 15

求解步骤

x \to - 5 lim (3 x - ∣ x + 5 ∣)

代入值

x = - 5

= 3 (- 5) - ∣ - 5 + 5 ∣

化简

3 (- 5) - ∣ - 5 + 5 ∣ : - 15

= - 15

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