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I first had a question regarding infinitesimals. What does it mean when the infinitesimal is at the beginning of the integral? For example:

∫dxf(x)

is this the same as

∫f(x)dx ?

My second question was how to convert a summation to an integral and a summation into an integral. Thanks a lot,

-MMM

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# Infinitesimals in integration vs delta x in summations

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