Integrating exp(x^2) Without Numerical Methods: A Simple Guide

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Integrating exp(x^2) analytically is not feasible without numerical methods. The integral can be expressed using the imaginary error function, but this function typically requires numerical evaluation for most limits of integration. Special cases exist where it can be solved, but they are limited. Overall, numerical methods remain essential for practical evaluation of this integral. Thus, integrating exp(x^2) analytically is largely impractical.
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Is it possible to integrate exp(x^2) without using numerical methods?
 
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Not really...you can express it in terms of the imaginary error function, but with the exception of certain special limits of integration, the imaginary error function can only be evaluated numerically.
 
Question: A clock's minute hand has length 4 and its hour hand has length 3. What is the distance between the tips at the moment when it is increasing most rapidly?(Putnam Exam Question) Answer: Making assumption that both the hands moves at constant angular velocities, the answer is ## \sqrt{7} .## But don't you think this assumption is somewhat doubtful and wrong?

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