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#1
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ËÒ¾¨¹ì·ÑèÇä»ãËé˹èͤÃѺ ¤Ô´äÁèÍÍ¡ T_T
ËÒ¾¨¹ì·ÑèÇ仢ͧÅӴѺ
2/3,0,3/4,0,4/5,... 24 ¡ØÁÀҾѹ¸ì 2011 22:43 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 1 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ first |
#2
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$(\frac{1-(-1)^n}{2})(\frac{3+n}{5+n})$
24 ¡ØÁÀҾѹ¸ì 2011 23:31 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 2 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ yellow |
#3
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¢Í·ÃÒºÇÔ¸Õ¤Ô´ä´éÁÑé¤ÃѺ
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#4
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$a_n=\dfrac{1}{720}(n-2)(n-4)(179n^2-1066n+1047)$
25 ¡ØÁÀҾѹ¸ì 2011 00:28 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 1 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ Amankris |
#5
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\(a_n=\cases{\frac{n+3}{n+5}&,n à»ç¹¨Ó¹Ç¹¤Õè\\0&,n à»ç¹¨Ó¹Ç¹¤Ùè}\)
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#6
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ÅӴѺ˹Öè§àÃÒËÒ¾¨¹ì·ÑèÇä»ä´éËÅÒÂẺ¹Ð¤ÃѺ
äÁèÁÕ¡¯µÒµÑÇ áÅéÇáµè¤¹¨ÐÁͧ |
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