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Question Number 170106 by Beginner last updated on 16/May/22

Answered by cortano1 last updated on 17/May/22

$$\underset{x\to \mathrm{\infty }}{\lim }{5}^x\sin \left(\frac{a}{5^x}\right)$$$$let\frac{1}{5^x}=t$$$$=\underset{t\to 0}{\lim }\frac{\sin at}{t}=a$$

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