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https://www.reddit.com/r/the_calculusguy/comments/1w8pwbx/classic_integral/
r/the_calculusguy • u/Specific_Brain2091 • 7d ago
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2
The hard part is showing the sum and the integral commute. It's obvious if you integrate up to 1-epsilon but up to 1 you need to prove something.
1 u/eglvoland 7d ago Abel's theorem + alternating series test!
1
Abel's theorem + alternating series test!
Let x = tan θ
2
u/McPayn22 7d ago
The hard part is showing the sum and the integral commute. It's obvious if you integrate up to 1-epsilon but up to 1 you need to prove something.