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NAKHON 18 ¡Ã¡®Ò¤Á 2010 13:53

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nongtum 18 ¡Ã¡®Ò¤Á 2010 14:49

hint: àÊ鹡ӡѺà»ç¹àÊ鹵ç·ÕèÁÕ¤èÒÊÑÁºÙóì¢Í§¤ÇÒÁªÑ¹¹éÍ·ÕèÊØ´ ·ÕèàÊ鹵ç¹Ñ鹨ÐäÁèµÑ´¡ÃÒ¿äÎà¾ÍÃìâºÅÒ

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NAKHON 18 ¡Ã¡®Ò¤Á 2010 15:11

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nongtum 18 ¡Ã¡®Ò¤Á 2010 15:15

hint#2: $\displaystyle{\lim_{n\to \infty} S_n=\lim_{k\to \infty}\sum_{n=1}^k a_n=m}$


àÇÅÒ·ÕèáÊ´§·Ñé§ËÁ´ à»ç¹àÇÅÒ·Õè»ÃÐà·Èä·Â (GMT +7) ¢³Ð¹Õéà»ç¹àÇÅÒ 16:28

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