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Lim X → 0 8 X − 2 X X

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Question

\[\lim_{x \to 0} \frac{8^x - 2^x}{x}\]

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Solution

\[\lim_{x \to 0} \left[ \frac{8^x - 2^x}{x} \right]\]
\[ = \lim_{x \to 0} \left[ \frac{\left( 8^x - 1 \right)}{x} - \frac{\left( 2^x - 1 \right)}{x} \right]\]
\[ = \log \left( 8 \right) - \log \left( 2 \right)\]
\[ = \log \left( \frac{8}{2} \right)\]
\[ = \log 4\]

 

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Chapter 29: Limits - Exercise 29.1 [Page 71]

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R.D. Sharma Mathematics [English] Class 11
Chapter 29 Limits
Exercise 29.1 | Q 24 | Page 71

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