Клик на название графика включает/выключает его. "-Дельта" - графики скорости изменения, единиц в минуту.
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Опубликовано: 05-10-2021 04:39:13
This problem is adapted from a national math competition exam in France. Special thanks this month to: Michael Anvari, Robert Zarnke, Fiona Harper, Kyle, Jamal Jackson. Mike Robertson. Thanks to all supporters on Patreon! http://www.patreon.com/mindyourdecisions
0:00 Problem
0:44 Method 1
3:52 Method 2
6:11 Method 3
I learned about methods 2 and 3 on Quora
https://www.quora.com/What-is-sum-of-the-series-1-2-+2-3-+3-4-+-to-infinity
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