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(5) จงหาค่า \( \lim _{x \rightarrow-1}\left(x^{3}+2 x+5\right) \)

Ask by Delgado Martin. in Thailand
Feb 04,2025

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ค่า \( \lim _{x \rightarrow-1}\left(x^{3}+2 x+5\right) = 2 \)

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ในการหาค่า \( \lim _{x \rightarrow -1} \left(x^{3} + 2x + 5\right) \) เราสามารถแทนค่า \( x = -1 \) ในฟังก์ชันได้เลย ซึ่งจะได้ว่า \[ \lim _{x \rightarrow -1} \left(x^{3} + 2x + 5\right) = (-1)^{3} + 2(-1) + 5 = -1 - 2 + 5 = 2. \] ดังนั้นค่า \( \lim _{x \rightarrow -1} \left(x^{3} + 2x + 5\right) = 2 \) ครับ!

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