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受欢迎的微积分 >

limit as x approaches 3 of-2x^2-x

解答

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

解答

- 21

求解步骤

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

代入值

x = 3

= - 2 \cdot 3^{2} - 3

化简

= - 21

作图

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