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Old 27 ¡Ã¡®Ò¤Á 2016, 21:05
Nephelpito Nephelpito äÁèÍÂÙèã¹Ãкº
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Old 27 ¡Ã¡®Ò¤Á 2016, 21:41
otakung otakung äÁèÍÂÙèã¹Ãкº
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⨷Âì¼Ô´ÁÑ駤ÃѺ ËÒä´éá¤è b µÑÇà´ÕÂÇ
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Old 29 ¡Ã¡®Ò¤Á 2016, 11:40
Ruth Bimbo Ruth Bimbo äÁèÍÂÙèã¹Ãкº
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¶éÒà»ÅÕè¹à§×è͹䢢ͧ a, b, c ,d ãËéà»ç¹¨Ó¹Ç¹àµçÁ

¨Ò¡µÑÇàÅ×Í¡ ¤ÓµÍº·Õèà»ç¹ä»ä´éÁÕ §. 25 à¾Õ§¢éÍà´ÕÂÇ

à¾ÃÒÐ a = c , d = 2a áÅÐ b = 5

´Ñ§¹Ñé¹ a + c +d = 4a

¨Ðä´é a + b + c + d = 4a + 5 = 4(a +1) + 1 (¨Ó¹Ç¹·ÕèËÒôéÇ 4 áÅéÇàËÅ×ÍàÈÉ 1)
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