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#1289 Re: Help Me ! » Why isn't the Feynman Integration Trick Working? » 2015-09-17 02:04:16

Here's a video where I use contour integration to evaluate
: https://www.youtube.com/watch?v=VbDhg4PdHIg

It's a simple example, and one that can easily be done in more elementary ways, but I figured it would be easier to start with one of the easier problems before moving on to the harder ones.

Part 2, where I evaluate
using methods of contour integration, is available here: https://www.youtube.com/watch?v=gYHNplUnGCk

And here's Part 3, where I evaluate
.

#1290 Re: Help Me ! » Why isn't the Feynman Integration Trick Working? » 2015-09-16 23:03:05

I think I will instead upload a series of videos using contour integration, near the end of which I'll tackle Agnishom's problem. I'll start with some simpler examples, so you can get a feel for the residue theorem and the estimation lemma, before talking about the log integral.

#1291 Re: Help Me ! » Simplifying complex numbers » 2015-09-16 22:19:14

It now remains for you to show that
.

#1299 Re: Help Me ! » Adding fractions? » 2015-09-16 09:18:43

Hi Sarah Rebekah18,

Here's a tutorial about how to add any two fractions: https://www.youtube.com/watch?v=ywycowKlgDg

and here's the official Adding Fractions page from Math Is Fun.

#1300 Re: Help Me ! » Why isn't the Feynman Integration Trick Working? » 2015-09-16 00:41:39

You could do the second using a toy contour. I'll post up a video solution soon.

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