/sci/ - Science & Math » Thread #12871310

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/mg/ - math general

Anonymous Tue 23 Mar 06:45:22 2021 No.12871310 View Reply Original Report

Quoted By: >>12873671

Drunk deriving edition
Last thread: >>12853803
Use for homework help: >>12859202

Anonymous

Anonymous Tue 23 Mar 2021 11:11:13 No.12871935 Report

Quoted By:

Question from a 12th grade mock test: Let AB and A'B' be 2 lines. N is a common middle. Prove that AB' + BA' (vectors) is 0

I did it with versors but I heard a million waya to do it

Anonymous

Anonymous Tue 23 Mar 2021 11:46:25 No.12872026 Report

Quoted By:

What is your favourite differential equation?

Anonymous

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Anonymous Tue 23 Mar 2021 15:47:07 No.12872693 Report

Quoted By: >>12872701

Is there an elegant way to derive that the radius of convergence of $\frac{1}{x^2 + 1}$ at $0$ is $\sqrt{2}$ , without involving complex numbers?

Anonymous

Anonymous Tue 23 Mar 2021 15:50:06 No.12872701 Report

Quoted By:

>>12872693
Meant at 1, not at 0.

Radius of convergence at $k$ being $\sqrt{1+k^2}$ in general.

Anonymous

Anonymous Tue 23 Mar 2021 19:54:27 No.12873671 Report

Quoted By:

>>12871310
>he still has hope
I really don't recommend having hope.

Anonymous

Anonymous Tue 23 Mar 2021 20:22:57 No.12873786 Report

Quoted By:

Try not to cringe challenge
https://www.youtube.com/watch?v=WaxiL4IRIYw

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