This is a blue board which means that it's for everybody (Safe For Work content only). If you see any adult content, please report it.

Thread replies: 5

Thread images: 1

Thread images: 1

Can someone explain why the anticausal form of a geometric series with |R|>1 is the same as the causal geometric series with |R|<1? This is completely unintuitive.

I'm talking about this shit:

https://ccrma.stanford.edu/~jos/filters/Geometric_Series.html

>>

what exactly are you confused by on that page?

>>

>>9166688

I just realized I misphrased my ask. I meant: why does that math actually match up with the original geometric sequence for |R|>1

>>

>>9166698

Why does the geometric sequence R^n where |R|>1 have the closed form of -R^-1/(1-R^-1)? Why do those two things have any relation? Why does a divergent series have a closed form?

>>

>>9166705

>Why does the geometric sequence R^n where |R|>1 have the closed form of -R^-1/(1-R^-1)?

1/(1-R) =

R^(-1)/(R^(-1)-1) =

-R^(-1)/(1-R^(-1))

Thread posts: 5

Thread images: 1

Thread images: 1

If a post contains copyrighted or illegal content, please click on that post's

All trademarks and copyrights on this page are owned by their respective parties. Images uploaded are the responsibility of the Poster. Comments are owned by the Poster.

This is a 4chan archive - all of the content originated from that site. This means that 4Archive shows an archive of their content. If you need information for a Poster - contact them.