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#1
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¾ÔÊÙ¨¹ì a ¡ÓÅѧÊͧ +b ¡ÓÅѧÊͧÁÒ¡¡ÇèÒËÃ×Íà·èҡѺ 2ab
¾ÔÊÙ¨¹ì a ¡ÓÅѧÊͧ +b ¡ÓÅѧÊͧÁÒ¡¡ÇèÒËÃ×Íà·èҡѺ 2ab ·Óä§ÍèÒ¤Ð
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#2
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àÃÔèÁ¨Ò¡ $(a-b)^2\ge0$ áÅéǨѴÃÙ»¤ÃѺ
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¤¹ä·ÂÃèÇÁã¨ÍÂèÒãªéÀÒÉÒÇÔºÑµÔ ½Ö¡¾ÔÁ¾ìÊÑÅѡɳìÊÑ¡¹Ô´ ªÕÇÔµ(¤¹µÍºáÅФ¹¶ÒÁ)¨Ð§èÒ¢Öé¹àÂÍÐ (¨ÃÔ§æ¹Ð) Stay Hungry. Stay Foolish. |
#3
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$(a-b)^2\geq 0$
$a^2-2ab+b^2\geq 0$ ¨Ðä´é $a^2+b^2\geq 2ab$ µÒÁµéͧ¡ÒäèÐ 10 àÁÉÒ¹ 2008 13:40 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 1 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ Anonymer |
#4
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¶éÒá·¹ a ËÃ×Í b = 0
¤èÒÁѹ¡ç¨Ðà·èҡѹ´éÇ àÍêÂäÁèãªè¾ÔÁ¾ì¼Ô´·Õè¨ÃÔ§µé᷹ͧ a áÅÐ b = 0 ¤èÒÁѹ¡ç¨Ðà·èҡѹ´éÇÂãªèäËÁ¤ÃѺ
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µéͧ¤Ô´ µéͧ·Ó ¡è͹¨ÐºÍ¡ÇèÒ·ÓäÁèä´é 30 ¾ÄÉÀÒ¤Á 2008 20:21 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 1 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ nongtum à˵ؼÅ: double post |
#5
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¶éҤس¾ÔÁ¾ì¼Ô´¡ç¤Çᴵçá¡éä¢áÅéÇä»á¡é㹤ÍÁàÁ¹µì¹Ñ鹹ФÃѺ äÁè¤Çõͺ㹤ÍÁàÁ¹µìãËÁè
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I think you're better than you think you are. |
#6
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ÍÊÁ¡ÒèÐà»ÅÕè¹à»ç¹=µèÍàÁ×èÍ a=b=0
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à¢ÒäÁèÃÙéÇèÒÁѹà»ç¹ä»äÁèä´é à¢Ò¨Ö§·ÓÁѹÊÓàÃç¨1% ¤×;ÃÊÇÃäì ÍÕ¡99% ¤×ͤÇÒÁ¾ÂÒÂÒÁ(â·ÁÑÊ ÍÑÅÇÒ àÍ´ÔÊѹ) |
#7
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ÍéÒ§ÍÔ§:
$a^2-2ab+b^2\geqslant 0$ $\therefore a^2+b^2\geqslant 2ab$ Êٵ÷ÕèµÒÁÁÒ(AM.-GM.) $x_i\in \mathbb{N} $ àÁ×èÍ $i=1,2,3,\ldots ,n$ $\frac{x_1+x_2+x_3+\ldots +x_n}{n}\geqslant \sqrt[n]{x_1x_2x_3\cdots x_n}$ ààÅÐÊÁ¡ÒèÐà»ç¹¨ÃÔ§àÁ×èÍ $x_1=x_2=x_3=\ldots =x_n$ 30 ¾ÄÉÀÒ¤Á 2008 22:44 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 2 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ The jumpers |
#8
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site:mathcenter.net ¤Ó¤é¹ |
#9
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ÍëÍÍÍÍ.... ãªè¤ÃѺ ¢Íº¤Ø³ÁÒ¡¤ÃѺÍÔÍÔ...
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