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>> No.15229982 [DELETED]  [View]
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15229982

I have not seriously integrated a function in years now.
What the fuck just happened here? I am most recently familiar with Lebesgue integration form my measure theory classes, so I completely forgot about these tricks and treating dx as an "infitestimal" or a "really small change in x".
Can someone explain why you are allowed to do this?

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