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nguyenthithuong782001
2 năm trước
Chứng minh `1/2^2+1/3^2+1/4^2+1/5^2+1/6^2+1/7^2+1/8^2+1/9^2+1/10^2+1/11^2+1/13^2+1/14^2+1/15^2+1/16^2+1/17^2+1/18^2+1/19^2+1/20^2+1/21^2+1/22^2+1/23^2+1/24^2+1/25^2+1/26^2+1/27^2+1/28^2+1/29^2+1/30^2+1/31^2+1/32^2+1/33^2+1/34^2+1/35^2+1/36^2+1/37^2+1/38^2+1/39^2+1/40^2+1/41^2+1/42^2+1/43^2+1/44^2+1/45^2+1/46^2+1/47^2+1/48^2+1/49^2+1/50^2+1/51^2+1/52^2+1/53^2+1/54^2+1/55^2+1/56^2+1/57^2+1/58^2+1/59^2+1/60^2+1/61^2+1/62^2+1/63^2+1/64^2+1/65^2+1/66^2+1/67^2+1/68^2+1/69^2+1/70^2+1/71^2+1/73^2+1/74^2+1/75^2+1/76^2+1/77^2+1/78^2+1/79^2+1/80^2+1/81^2+1/82^2+1/83^2+1/84^2+1/85^2+1/86^2+1/87^2+1/88^2+1/89^2+1/90^2+1/91^2+1/92^2+1/93^2+1/94^2+1/95^2+1/96^2+1/97^2+1/98^2+1/99^2+1/100^2<1/2`
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