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Lim X → 0 E X − X − 1 2 - Mathematics

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Question

\[\lim_{x \to 0} \frac{e^x - x - 1}{2}\] 

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Solution

\[\lim_{x \to 0} \left[ \frac{e^x - x - 1}{2} \right]\]
\[ e^x = 1 + \frac{x}{1!} + \frac{x^2}{2!} + \frac{x^3}{3!} + . . . . . \infty \]
\[ = \lim_{x \to 0} \left[ \frac{\left( 1 + \frac{x}{1!} + \frac{x^2}{2!} + \frac{x^3}{3!} . . . . \infty \right) - x - 1}{2} \right]\]
\[ = \lim_{x \to 0} \left[ \frac{\frac{x^2}{2!} + \frac{x^3}{3!} + . . . . \infty}{2} \right]\]
\[ = 0\]

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Chapter 29: Limits - Exercise 29.1 [Page 72]

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RD Sharma Mathematics [English] Class 11
Chapter 29 Limits
Exercise 29.1 | Q 34 | Page 72

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