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#1
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àÃ×èͧ¢Í§¨Ó¹Ç¹à©¾ÒзÕ觧
¨§ËҨӹǹ੾ÒзÕèÁÕ¤èÒÁÒ¡·ÕèÊØ´ «Öè§à»ç¹µÑÇ»ÃСͺ ¢Í§ 4^9 + 9^4
¤Ô´Âѧä§ÍФÃѺ(¢Íâ·É¤ÃѺà¢Õ¹¡¡ÓÅѧäÁèà»ç¹) |
#3
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¨Ñ´ä´éáÅéÇ仵èÍä§ÍèÒ
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#4
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#3
ÅͧᡵÑÇ»ÃСͺ¾ËعÒÁã¹ #2 ÊÔ¤ÃѺ
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¤¹ä·ÂÃèÇÁã¨ÍÂèÒãªéÀÒÉÒÇÔºÑµÔ ½Ö¡¾ÔÁ¾ìÊÑÅѡɳìÊÑ¡¹Ô´ ªÕÇÔµ(¤¹µÍºáÅФ¹¶ÒÁ)¨Ð§èÒ¢Öé¹àÂÍÐ (¨ÃÔ§æ¹Ð) Stay Hungry. Stay Foolish. |
#5
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µÍ¹¨Ñ´ÃÙ» µÍ¹·Õè¨Ñ´Áѹ¨Ð¡ÅÒÂà»ç¹·È¹ÔÂÁÊÔ¤ÃѺ¶éÒ¡ÓÅѧ 4 ¤×ͤÑÇ4^9 ¶éҨѴà»ç¹¡ÓÅѧ 4 ¨Ð¡ÅÒÂà»ç¹ (4^(9/4)) áÅéǤèÍ¡¡ÓÅѧ 4 «Öè§Áѹ¡çäÁèä´é¡ÅÒÂà»ç¹¨Ó¹Ç¹àµçÁÍÕ¡ÊÔ¤ÃѺ
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#6
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ËÁÒ¶֧ÍÂèÒ§¹Õé¤ÃѺ $9^4+4^9=9^4+4\cdot4^{8}=9^4+4\cdot16^{4}$
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#7
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ÍéÒ§ÍÔ§:
àÅè¹áºº¶Ö¡æä»àÅ $4^9 + 9^4 = 4\cdot 4^8 + (9^2)^2 = 4 \cdot 16^4 + 81^2 = (2 \cdot 256)^2 + 81^2 = 512^2 + 6561 = 262144+ 6561 = 268705 = 5 \cdot 61 \cdot 881$
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ÁÒËÒ¤ÇÒÁÃÙéäÇéµÔÇËÅÒ¹ áµèËÅÒ¹äÁèàÍÒàÅ¢áÅéÇ à¢éÒÁÒ·ÓàÅ¢àÍÒÁѹÍÂèÒ§à´ÕÂÇ ¤ÇÒÁÃÙéà»ç¹ÊÔè§à´ÕÂÇ·ÕèÂÔè§ãËé ÂÔè§ÁÕÁÒ¡ ÃÙéÍÐäÃäÁèÊÙé ÃÙé¨Ñ¡¾Í (¡àÇ鹤ÇÒÁÃÙé äÁèµéͧ¾Í¡çä´é ËÒäÇéÁÒ¡æáËÅдÕ) (áµè¡çÍÂèÒãËéÁÒ¡¨¹·èÇÁËÑÇ àÍÒµÑÇäÁèÃÍ´) |
#8
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¨ÐªèÇÂãËéᡵÑÇ»ÃСͺ§èÒ¢Ö鹤ÃѺ
$$x^4+4y^4=(x^2+2y^2)^2-(2xy)^2=(x^2-2xy+2y^2)(x^2+2xy+2y^2)$$ |
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