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Time range (days ago):
31.12.2025
Andrei Verner edited his profile info. 
317 days ago
30.12.2025
Andrei Verner edited his profile info. 
318 days ago
19.06.2025
Andrei Verner edited his profile info. 
512 days ago
Andrei Verner edited his profile info. 
512 days ago
18.05.2025
Andrei Verner edited his profile info. 
544 days ago
02.03.2025
Andrei Verner edited his profile info. 
621 days ago
07.10.2024
Andrei Verner edited his profile info. 
767 days ago
05.10.2024
Andrei Verner added new article. 
Суммы прогрессий: 1,2,3,4,5..., -1,-2,-3,-4,-5... Можно найти с помощью формулы:Sn= (n²a₁+n)/2. Суммы прогрессий: 1,3,6,10,15..., -1,-3,-6,-10,-15... Можно найти с помощью формулы:Sn= ((n+a₁)³-(n+a₁))/6. Суммы прогрессий: 1,4,9,16,25..., -1,-4,-9,-16,-25... Можно найти с помощью формулы:Sn= a₁(n+a₁)(n²a₁+0.5n)/3. (где n - количество суммируемых членов, a₁ -первый член прогрессии).
769 days ago
Andrei Verner added new article. 
Progress Sums: 1,2,3,4,5..., -1,-2,-3,-4,-5... It can be found using the formula: Sn=(n²a₁+n)/2. Progress Sum: 1,3,6,10,15..., -1,-3,-6,-10,-15... It can be found using the formula: Sn= ((n+a₁)³-(n+a₁))/6. Progress Sum: 1,4,9,16,25..., -1,-4,-9,-16,-25... It can be found using the formula: Sn= a₁(n+a₁)(n²a₁+0.5n)/3. (Where n - is the number of summable terms, a₁ - is the first term of the progression).
769 days ago
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