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Anonymous Sat 02 May 13:49:52 2020 No.11628322 View Reply Original Report

Quoted By: >>11628323 >>11628389 >>11629938 >>11629950

I know that $0.999...=1$ but when dealing with derivatives does $1- \sum_{k=1}^\infty \frac{9}{10^x} = dx$ ? Because you divide by the limit, right?

Anonymous

Anonymous Sat 02 May 2020 13:50:48 No.11628323 Report

Quoted By: >>11629950

>>11628322
No, what you wrote is equivalent to
dx=0

Anonymous

Anonymous Sat 02 May 2020 14:09:03 No.11628389 Report

Quoted By: >>11629959

>>11628322
no. dx is not zero, dx is not an infinitesimal. it's an object far beyond the comprehension of the average 0.999... != 1 poster.

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Chillfill >paypal.com/chillfill Sat 02 May 2020 22:28:31 No.11629938 Report

Quoted By:

>>11628322
Yeah fuck Chegg. Pay for calculus tutoring @ paypal.com/chillfill $40/hr and I won't sell you out if you wan't me to help you on an exam. If you just want a homework answer I can do that too for $10/problem. Don't get fucked by academia's bullshit
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Anonymous

Anonymous Sat 02 May 2020 22:31:01 No.11629950 Report

Quoted By: >>11629978

>>11628322
>.999...=1
But it doesn't you fucking retard. .999... is an infinitesimal hyperreal. It is not a real number.
>does 1 minus that summation equal dx
yea it can. Not all infinitesimal hyperreals are equal though. In fact not all .9... are equal.
You might be interested in the first few chapters of Keisler's book Infinitesimal Approach
>>11628323
t. brainlet

Anonymous

Anonymous Sat 02 May 2020 22:32:11 No.11629959 Report

Quoted By: >>11629965 >>11629978

>>11628389
>dx is not an infinitesimal
The inventors of calculus and the inventors of dx notation would like to have a word with you. A very angry word with you.
By the way, the dx is integral notation is also an infintesimal.

Anonymous

Anonymous Sat 02 May 2020 22:33:13 No.11629965 Report

Quoted By: >>11629978

>>11629959
Excuse me, I should have said inventor of dx notation, as it had a single inventor. Leibinz or whatever the fuck his name is. (of course inventors of calculus was accurately plural)

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Chillfill >paypal.com/chillfill Sat 02 May 2020 22:36:40 No.11629978 Report

Quoted By: >>11629990

>>11629950
>>11629959
>>11629965
Heh, guys, why don't you settle this the smart way and ask an expert. I have expertise in mathematical history, analysis, and the study of the hyperreals. 10% Discount if you buy within the next 15 minutes!

Anonymous

Anonymous Sat 02 May 2020 22:38:38 No.11629990 Report

Quoted By: >>11630001

>>11629978
How much will you pay me to listen to you ramble about your wrong positions on hyperreals and .9...?

Chillfill >paypal.com/chillfill

Chillfill >paypal.com/chillfill Sat 02 May 2020 22:40:51 No.11630001 Report

Quoted By:

>>11629990
100*(1+2+3+4+...)

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