Timeline for Sum of First $n$ Squares Equals $\frac{n(n+1)(2n+1)}{6}$
Current License: CC BY-SA 4.0
26 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 5 at 20:51 | history | edited | leonbloy | CC BY-SA 4.0 |
deleted 8 characters in body
|
| Jan 13 at 18:33 | comment | added | QuantumPotatoïd | If one use fractional calculus like half derivative, does it give the sum of square roots of k ? | |
| Nov 20, 2023 at 0:43 | comment | added | mick | One from the book !! | |
| May 25, 2023 at 6:45 | comment | added | Lukáš J. | No, it will become non-zero. In this case the second derivative of the denominator in (2) evaluated at 1 is 2. | |
| Dec 5, 2022 at 17:25 | history | edited | leonbloy | CC BY-SA 4.0 |
added 33 characters in body
|
| Aug 19, 2020 at 1:35 | comment | added | roulette01 | Regarding using l'hopital's rule. Won't you always get 0/0 since the derivative will always have 0 in the denominator? | |
| Sep 17, 2019 at 17:59 | history | edited | leonbloy | CC BY-SA 4.0 |
deleted 5 characters in body
|
| Jan 30, 2019 at 12:19 | history | edited | leonbloy | CC BY-SA 4.0 |
added 221 characters in body
|
| Oct 24, 2018 at 2:16 | history | edited | leonbloy | CC BY-SA 4.0 |
deleted 1 character in body
|
| Feb 26, 2017 at 23:34 | history | edited | leonbloy | CC BY-SA 3.0 |
added 33 characters in body
|
| Nov 25, 2016 at 18:13 | comment | added | Simply Beautiful Art | *ahem* I personally like this for calculating the harmonic numbers. | |
| Jun 20, 2016 at 18:04 | comment | added | user141854 | This is quite nifty! (+1) | |
| Jan 11, 2016 at 12:42 | history | edited | leonbloy | CC BY-SA 3.0 |
added 347 characters in body
|
| Jan 11, 2016 at 12:17 | history | edited | leonbloy | CC BY-SA 3.0 |
added 347 characters in body
|
| Dec 13, 2015 at 18:57 | comment | added | most venerable sir | @leonbloy, why did you start by taking derivative? | |
| Oct 21, 2015 at 16:10 | comment | added | Hypergeometricx | Just found this. Bravo! What an interesting proof! (+1) | |
| May 10, 2013 at 16:30 | comment | added | leonbloy | @PeterTamaroff : I knew this from another compatriota | |
| Mar 30, 2013 at 15:47 | comment | added | AndreasT | Really nice! +1 | |
| Feb 5, 2013 at 21:52 | history | edited | glebovg | CC BY-SA 3.0 |
added 10 characters in body
|
| Mar 24, 2012 at 6:48 | comment | added | Pedro♦ | @leonbloy Interesting! Will look at this tomorrow! | |
| Jul 11, 2011 at 2:10 | comment | added | BS. | I waited in order to gain the commenting privilege just to say this : You made me fall in love with calculus again !! | |
| Jul 10, 2011 at 16:54 | comment | added | ttt | So slick I laughed reading this! | |
| Jul 10, 2011 at 14:29 | history | edited | leonbloy | CC BY-SA 3.0 |
added 21 characters in body
|
| Jul 10, 2011 at 1:33 | comment | added | Patrick Da Silva | I must admit I didn't know this one even though the problem is quite popular. +1 | |
| Jun 28, 2011 at 15:00 | history | edited | leonbloy | CC BY-SA 3.0 |
added 130 characters in body
|
| Jun 28, 2011 at 14:28 | history | answered | leonbloy | CC BY-SA 3.0 |