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ava110856
@ava110856
October 2021
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Высшая математика. Срочно 50 баллов за лучший ответ
[tex] \frac{1}{1 \times 2} + \frac{1}{2 \times 3} + \frac{1}{3 \times 4} + ... + \frac{1}{n(n + 1)} + ...[/tex]
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Роман1233212002
Формула : 1/b-a * (1/a - 1/b)
Решение : 1(1-1/n+1)=n/n+1=n+1/n
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ava110856
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Решение : 1(1-1/n+1)=n/n+1=n+1/n