This isn't really a homework question, but it has been bugging me for ages.(adsbygoogle = window.adsbygoogle || []).push({});

In [tex]\int f(x) \, dx[/tex] what exactly does the 'dx' represent? Is it a differential? What is a differential?

I only use the 'dx' part to identify the variable that the function is being integrated with respect to... or does it have another meaning?

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# What *exactly* does the 'dx' mean in integral notation?

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