|dx| vs dx in an integral - can someone explain the difference to me?

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The discussion centers on the difference between using |dx| and dx in integrals. Participants express confusion about the notation |dx|, noting that it is not commonly seen in integral calculus. A request for examples or links to clarify the usage of |dx| is made. The conversation highlights a need for clearer definitions and explanations regarding integral notation. Understanding the distinction between these notations is essential for proper mathematical interpretation.
TaylorWatts
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Just need to know a definition :/
 
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Hi TaylorWatts! :smile:

I've never seen |dx| in an integral. :confused:

Can you give a link to an example? :smile:
 
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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