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Lim X → 0 Log ( a + X ) − Log a X - Mathematics

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Question

\[\lim_{x \to 0} \frac{\log \left( a + x \right) - \log a}{x}\]

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Solution

\[\lim_{x \to 0} \left[ \frac{\log \left( a + x \right) - \log a}{x} \right]\]
\[ = \lim_{x \to 0} \left[ \frac{\log \left( \frac{a + x}{a} \right)}{x} \right]\]
\[ = \lim_{x \to 0} \left[ \frac{\log \left( 1 + \frac{x}{a} \right)}{\frac{x}{a} \times a} \right]\]
\[ = \frac{1}{a} \times 1\]
\[ = \frac{1}{a}\]

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Chapter 29: Limits - Exercise 29.1 [Page 71]

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RD Sharma Mathematics [English] Class 11
Chapter 29 Limits
Exercise 29.1 | Q 22 | Page 71

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