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#1
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͸ԺÒÂà¡ÕèÂǡѺ UPPER&LOWER BOUND ãËé˹èͤÃѺ
§§ÍФѺà¡ÕèÂǡѺ UPPER&LOWER BOUND ÃÇÁ¶Ö§àÃ×èͧ supremum&infimum ´éǤÃѺ
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#2
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¹ÔÂÒÁ ãËé $A\subseteq \mathbb{R}$ Upper bound ¢Í§ $A$ ¤×Í ¨Ó¹Ç¹¨ÃÔ§ $M$ ·Õè·ÓãËé ·Ø¡ÊÁÒªÔ¡ã¹ $A$ ¹éÍ¡ÇèÒ $M$
Êèǹ supremum ¤×Í upper bound ·Õè¹éÍ·ÕèÊØ´ àªè¹ $A=(0,1)$ upper bound ¢Í§ $A$ ¤×Í ·Ø¡¨Ó¹Ç¹ã¹ªèǧ $[1,\infty ) $ áµè $\sup A = 1$
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#3
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¢Íº¤Ø³¤ÃѺ...Í×ÁáÅé§lower ËÅФÃѺ
ÊèǹªèǧËÅФÃѺÁռŴéǪèÒÂäËÁ¤ÃѺ EX. (0,1] à¤éÒãËéËÒ inf,sup,min,max ***ÁÕ¢éÍÁÙÅ ËÃ×Íà¹×éÍËÒÁ˹ѧÊ×Í µÃ§ä˹ãËé¼ÁÍèÒ¹äËÁ¤ÃѺ*** ¢Íº¤Ø³¤ÃѺ |
#4
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ÁÕ¼Åá¹è¹Í¹¤ÃѺ ¢Ö鹡Ѻ૵ ¢éÍÁÙŶéÒµéͧ¡ÒÃẺ¾ÔÊÙ¨¹ì´éÇÂËÒä´éµÒÁ˹ѧÊ×Í Analysis ·ÑèÇ令ÃѺ
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PaTa PatA pAtA Pon! |
#5
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