#1
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¤Ô´Âѧä§ËÃͤÃѺ ¼Á¤Ô´áÅéǵԴµÑÇá»Ã
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#2
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⨷Âì¼Ô´ÁÑ駤ÃѺ ËÒä´éá¤è b µÑÇà´ÕÂÇ
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#3
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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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