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Question Number 171706 by Haisokheng last updated on 20/Jun/22

Answered by cortano1 last updated on 20/Jun/22

Answered by thfchristopher last updated on 20/Jun/22

$$\underset{x\to 1}{\lim }\frac{1-x^3}{\cos \frac{\pi }{x+1}}$$$$=\underset{x\to 1}{\lim }\frac{-3x^2}{\frac{\pi }{{(x+1)}^2}\sin \frac{\pi }{x+1}}$$$$=\frac{-3}{\frac{\pi }{4}}$$$$=-\frac{12}{\pi }$$

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