July 2022 1 4 Report
Сумма S существует и конечна. Найдите ее.
[tex] S = \frac{1}{4}-\frac{2}{4^2}+\frac{3}{4^3}-\frac{4}{4^4}+...+(-1)^{n+1}\frac{n}{4^n}+... [/tex]
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