#1
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àŢ¡¡ÓÅѧ ¤ÃѺ
$6(2^{5x}) +11(2^{3x})-6(2^{x}) = 2^{5x+1}$
ËÒ X ¤ÃѺ äÁèä´éà¢éÒÁÁÒã¹¹Õé¹Ò¹àÅ T^T ¤Ô´¶Ö§·Ø¡¤¹¤ÃѺ
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º·àÃÕ¹§èÒÂæ·Õèà´ç¡æä´éàÃÕ¹ÃÙéÂÔè§ÇÔè§àÃçÇà·èÒäËÃè ÂÔè§ÅéÁà¨çºÁÒ¡à·èÒ¹Ñé¹ 22 ÊÔ§ËÒ¤Á 2012 22:05 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 1 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ ÍÂÒ¡à¡è§¤³ÔµÈÒʵÃì¤ÃѺ |
#2
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$6(2^{5x})+11(2^{3x})-6(2^x)=2(2^{5x})$
$4(2^{5x})+11(2^{3x})-6(2^x)=0$ $2^x(4(2^{4x})+11(2^{2x})-6)=0$ ãËé $2^{2x}=A\ \ , A>0$ $2^x(4A^2+11A-6)=0$ 仵èÍä´éáÅéÇÁÑ駤ÃѺ
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¤³ÔµÈÒʵÃì ¤×Í ÀÒÉÒÊÒ¡Å ¤³ÔµÈÒʵÃì ¤×Í ¤ÇÒÁÊǧÒÁ ¤³ÔµÈÒʵÃì ¤×Í ¤ÇÒÁ¨ÃÔ§ µÔ´µÒÁªÁ¤ÅÔ»ÇÕ´ÕâÍä´é·Õèhttp://www.youtube.com/user/poperKM |
#3
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ÍéÒ§ÍÔ§:
·èÒ¹poper áÊ´§ãËé´Ù˹èÍ (Ẻ Á.µé¹¹Ð¤ÃѺ)
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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´) |
#4
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$2^x(4(2^{4x})+11(2^{2x})-6)=0$
¼Á·ÓµèͨҡµÃ§¹ÕéáÅéǡѹ $2^x >0$ ´Ñ§¹Ñé¹ $4(2^{4x})+11(2^{2x})-6=0$ ´Ù¤èÒdiscriminat $11^2+4(4)(6)=121+96$ $=217$ $2^x=\frac{-11\pm \sqrt{217} }{8} $ à¹×èͧ¨Ò¡ $2^x >0$ $2^x=\frac{ \sqrt{217}-11}{8} $ äÁèãªé $\log$ ¡çËҤӵͺäÁèä´é¤ÃѺ á¹è㨹ÐÇèÒ⨷Âì¶Ù¡¤ÃѺ àªç¤â¨·ÂìÍÕ¡Ãͺ´ÕäËÁ¤ÃѺ àÁ×èÍ¡Õéà¢Õ¹¼Ô´¤ÃѺÅاBanker......á¡éáÅéǤÃѺ
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"¶éÒàÃÒÅéÁºèÍÂæ ã¹·ÕèÊØ´àÃÒ¨ÐÃÙéÇèÒ¶éÒ¨ÐÅéÁ ÅéÁ·èÒä˹¨Ðà¨çº¹éÍ·ÕèÊØ´ áÅÐÃÙéÍÕ¡ÇèÒµèÍä»·ÓÂѧ䧨ÐäÁèãËéÅéÁÍÕ¡ ´Ñ§¹Ñ鹨§ÍÂèÒ¡ÅÑÇ·Õè¨ÐÅéÁ"...ÍÒ¨ÒÃÂìÍӹǠ¢¹Ñ¹ä·Â ¤ÃÑé§áá㹪ÕÇÔµ·ÕèÊͺ¤³ÔµÊÁÒ¤Á¤³ÔµÈÒʵÃìàÁ×èÍ»Õ2533...¼Áä´éá¤è24¤Ðá¹¹(¨Ò¡ÃéͤÐá¹¹) 23 ÊÔ§ËÒ¤Á 2012 09:47 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 1 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ ¡ÔµµÔ |
#5
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ÍéÒ§ÍÔ§:
¼Á¡çÁÒµÔ´µÃ§ $2^x=\frac{ \sqrt{217}-11}{8} $ áÅéÇ仵èÍäÁè¶Ù¡
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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´) |
#6
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#7
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ËÒ⨷Âìµé¹¨¹à¨ÍàŹФÃѺ¾ÕèàÅç¡ äÁèãªè¢éÍÊͺ¢Í§Á.µé¹ÍÂèÒ§·ÕèÅاBankerÇèÒ¨ÃÔ§æ´éÇÂ....´Ù¨Ò¡¤Ó¶ÒÁáÅéǹèÒ¨ÐäÁèµéͧËÒ $x$ µÃ§æ
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"¶éÒàÃÒÅéÁºèÍÂæ ã¹·ÕèÊØ´àÃÒ¨ÐÃÙéÇèÒ¶éÒ¨ÐÅéÁ ÅéÁ·èÒä˹¨Ðà¨çº¹éÍ·ÕèÊØ´ áÅÐÃÙéÍÕ¡ÇèÒµèÍä»·ÓÂѧ䧨ÐäÁèãËéÅéÁÍÕ¡ ´Ñ§¹Ñ鹨§ÍÂèÒ¡ÅÑÇ·Õè¨ÐÅéÁ"...ÍÒ¨ÒÃÂìÍӹǠ¢¹Ñ¹ä·Â ¤ÃÑé§áá㹪ÕÇÔµ·ÕèÊͺ¤³ÔµÊÁÒ¤Á¤³ÔµÈÒʵÃìàÁ×èÍ»Õ2533...¼Áä´éá¤è24¤Ðá¹¹(¨Ò¡ÃéͤÐá¹¹) |
#8
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ä˹æ¡çä˹æáÅéÇ ÁÒÅͧ·Ó´Ù µèͨҡ·èÒ¹ poper $(4A^2+11A-3)=0$ $(4A-1)(A+3) = 0$ $A = -3 \ \ \to \ 2^{2x} = -3 \ $ãªéäÁèä´é $4A = 1$ $4\cdot 2^{2x} = 1$ $2^{2x+2} = 1 = 2^0$ $2x+2 =0 \ \ \to \ x = -1$ $y =25(3-x) = 100$
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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´) |
#9
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ÍéÒ§ÍÔ§:
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¤³ÔµÈÒʵÃì ¤×Í ÀÒÉÒÊÒ¡Å ¤³ÔµÈÒʵÃì ¤×Í ¤ÇÒÁÊǧÒÁ ¤³ÔµÈÒʵÃì ¤×Í ¤ÇÒÁ¨ÃÔ§ µÔ´µÒÁªÁ¤ÅÔ»ÇÕ´ÕâÍä´é·Õèhttp://www.youtube.com/user/poperKM |
#10
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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´) |
#11
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ÍéÍ...§Õé¹Õèàͧ
äÁèä´éà¢éÒä»´Ù ¢Íâ·É´éǤÃѺ
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¤³ÔµÈÒʵÃì ¤×Í ÀÒÉÒÊÒ¡Å ¤³ÔµÈÒʵÃì ¤×Í ¤ÇÒÁÊǧÒÁ ¤³ÔµÈÒʵÃì ¤×Í ¤ÇÒÁ¨ÃÔ§ µÔ´µÒÁªÁ¤ÅÔ»ÇÕ´ÕâÍä´é·Õèhttp://www.youtube.com/user/poperKM |
#12
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¢Íâ·É·Õ¤ÃѺ àËç¹ ÍÒ¨ÒÃÂìà¢Õ¹⨷ÂìÁÒà຺¹ÕéàŨ´Å§ÊÁØ´äÇé¹èФÃѺ ààÊ´§ÇèÒ¼ÁÅÍ¡¼Ô´
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º·àÃÕ¹§èÒÂæ·Õèà´ç¡æä´éàÃÕ¹ÃÙéÂÔè§ÇÔè§àÃçÇà·èÒäËÃè ÂÔè§ÅéÁà¨çºÁÒ¡à·èÒ¹Ñé¹ |
#13
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¼ÁÂѧäÁèÃÙéàÅ expo log ÍÐäùÕéÅÐÁѹ·Ó¡Ñ¹Âѧ䧤ÃѺ
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º·àÃÕ¹§èÒÂæ·Õèà´ç¡æä´éàÃÕ¹ÃÙéÂÔè§ÇÔè§àÃçÇà·èÒäËÃè ÂÔè§ÅéÁà¨çºÁÒ¡à·èÒ¹Ñé¹ |
#14
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à»ç¹à¹×éÍËÒã¹ËÅÑ¡ÊÙµÃÁ.»ÅÒ¤ÃѺ
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#15
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á¹Ð¹ÓÇèÒãËé¤Øé¹à¤ÂàÍÒäÇé à¾ÃÒÐÁѹ¡çäÁèµèÒ§¨Ò¡ Á.µé¹ ÊÑ¡à·èÒäËÃè ¶éÒà»ÅÕè¹µÑÇá»Ãà»ç¹ Áѹ¡çÊÁ¡ÒøÃÃÁ´Ò (¡àÇ鹺ҧ¡Ã³Õ)
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