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MAIL:masaru-y@san¡¡su.org HomePage:»»¥Á¥ã¥ì¡¡¡¡27818 |
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ùDCE¤Ë;¸¹ÄêÍý¤Ç ¢ÜDEC¡á29/¡Ê2*9*12) ¢ÜABC¡áDEC¤Ê¤Î¤Ç ùABC¤Ç;¸¹ÄêÍý AC¡°2¡á12^2 + 16^2 - 2*12*16*29/(2*9*12) ¡á16*196/9 ¡èAC¡á¡¡4*14/3 ¡á¡¡56/3 ¢£ ¤È¤ê¤¢¤¨¤º¡¢°ìÈ֤˻פ¤¤Ä¤¤¤¿ÊýË¡¤Ç¤¹¡£ |
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¡¡¡¡27822 |
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#27822
>¹Í¤¨¤¿¤¯¤Ê¤¤¤Î¤Ç¥Ø¥í¥ó¤Î¸ø¼°¤«¤é£´¼¡ÊýÄø¼°¤òƳ¤²ò¤¤¤¿¡£ ¤Þ¤µ¤Ë°Ê²¼¤Î¤½¤ó¤Ê²òË¡¤Ç¤·¤¿(¤¤¤Ä¤âÄ̤ê)¡£ À褺¡¢Âê°Õ¤Î¿Þ¤ÇľÀþBA,CD¤ò±äŤ·¤Æ¤½¤Î¸òÅÀ¤òE¤È¤¹¤ë¤È AD:BC=7:16=EA:EA+12=ED:ED+14 ¤è¤ê 16*EA=7*(EA+12) ¤³¤ÎÊýÄø¼°¤ò²ò¤¯¤È solve(16*EA=7*(EA+12),EA);EA=28/3 ¤è¤ê EA+AB=EB=28/3+12=64/3 16*ED=7*(ED+14) ¤³¤ÎÊýÄø¼°¤ò²ò¤¯¤È solve(16*ED=7*(ED+14),ED);ED=98/9 ED+DC=EC=98/9+14=224/9 ¤è¤ê¢¤EBC¤ò¤Ø¥í¥ó¤Î¸ø¼°¤Çµá¤á¤ë¤È a1:64/3$ b1:224/9$ c1:16$ expand((a1+b1+c1)*(b1+c1-a1)*(c1+a1-b1)*(a1+b1-c1))$ sqrt(%)/4;448*SQRT(935)/81 ¤³¤³¤Ç¢¢ABCD=(448*SQRT(935)/81)*(207/256);161*SQRT(935)/36¡¦¡¦¡¦¡¦¡¦¡¦(1) ¤³¤³¤ÇÂê°Õ¤Î¿Þ¤Ç?=x¤È¤·¤Æ¢¤ADC,¢¤ABC¤ÎÌÌÀѤϤإí¥ó¤Î¸ø¼°¤è¤ê a2:12$ b2:16$ c2:x$ expand((a2+b2+c2)*(b2+c2-a2)*(c2+a2-b2)*(a2+b2-c2))$ sqrt(%)/4;¢¤ADC=sqrt(-x^4+800*x^2-12544)/4 a3:7$ b3:14$ c3:x$ expand((a3+b3+c3)*(b3+c3-a3)*(c3+a3-b3)*(a3+b3-c3))$ sqrt(%)/4;¢¤ABC=sqrt(-x^4+490*x^2-21609)/4 ¤³¤Î2¤Ä¤Î»°³Ñ·Á¤ÎϤ¬(1)¤Ê¤Î¤Ç sqrt(-x^4+800*x^2-12544)/4+sqrt(-x^4+490*x^2-21609)/4=161*SQRT(935)/36 ¤³¤ÎÊýÄø¼°¤òxmaxima¤Ç²ò¤¯¤È expand((sqrt(-x^4+800*x^2-12544)/4+sqrt(-x^4+490*x^2-21609)/4)^2-(161*SQRT(935)/36)^2)$ factor(%)$ num(%)$ part(%,1)$ expand(%^2)$ part(%th(3),2)+part(%th(3),3)+part(%th(3),4)$ expand(%^2)$ expand(%-%th(3))$ solve(%=0,x); x=-56/3(ÉÔ²Ä),x=56/3¡¦¡¦¡¦¡¦¡¦¡¦(Åú¤¨) x=-28*SQRT(917717)/(3*SQRT(327277))(ÉÔ²Ä),x=28*SQRT(917717)/(3*SQRT(327277))(ÉÔ²Ä) sqrt(-x^4+800*x^2-12544)/4+sqrt(-x^4+490*x^2-21609)/4=161*SQRT(935)/36sqrt¤ò²¿¤ÎÊÑ·Á¤â¤»¤º¤Ëmupad light 2.5.3¤Ç ¤Ç¤¤ë¤«¤ä¤Ã¤Æ¤ß¤è¤¦¤È»×¤¤¤Þ¤¹¡£ |
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MAIL:fttnm528@ybb.ne.jp ¡¡¡¡27823 |
fumio |
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#27823
>²¿¤ÎÊÑ·Á¤â¤»¤º¤Ëmupad light 2.5.3¤Ç ¤Ç¤¤ë¤«¤ä¤Ã¤Æ¤ß¤è¤¦¤È»×¤¤¤Þ¤¹¡£ ¤Ç¤¤Þ¤·¤¿¡£ solve(sqrt(-x^4+800*x^2-12544)/4+sqrt(-x^4+490*x^2-21609)/4=161*sqrt(935)/36,x); {-56/3, 56/3,-28*sqrt(917717)/(3*sqrt(327277)),28*sqrt(917717)/(3*sqrt(327277) sqrt¤¬SQRT¤Çerror¤Ç¤Ç¤¤Ê¤«¤Ã¤¿¤è¤¦¤Ç¤¹¡£ |
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MAIL:fttnm528@ybb.ne.jp ¡¡¡¡27825 |
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A(a,b),B(0,0),C(16,0),D(a+7,b)¤È¤ª¤¤¤Æ
AB=12¤è¤ê a^2+b^2=144 CD=14¤è¤ê (a+7-16)^2+b^2=196 ¤ÎϢΩÊýÄø¼°¤ò²ò¤¤¤Æa=29/18 BC^2=(a-16)^2+b^2=400-32a=3136/9 BC>0¤è¤êBC=56/3 |
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uchinyan |
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MAIL:uchi@sco.bekkoame.ne.jp ¡¡¡¡27828 |
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X^2=(16-29/18)^2+12^2-(29/18)^2=4^3*7^2/3^2 X=4*7*2/3=56/3 ¤·¤ó¤É¡£¡£¡£ ½ñ¤¹þ¤ß¸«¤Þ¤·¤¿¡¦¡¦¡¦ ¤Ê¤ë¤Û¤É¡ªÊ¿¹Ô»ÍÊÕ·Á¤Ç¡¢Áê»÷¤Ê»°³Ñ·Á¤¬¤Ç¤¤ë¤ó¤À¡Á¡ª¡ª ¤ª¤â¤·¤í¤¤¤Ç¤¹¤Í(^^) ¿Þ·Á¤Ï¡Ê¤â¡©¡Ë¶ì¼ê(^^; ¤·¤«¤¿¤Ê¤¯¡¢¡¢¡¢¥Ô¥¿¥´¥é¥¹¤ÎÄêÍý»È¤Ã¤Æ¤·¤Þ¤¤¤Þ¤·¤¿¡£OrZ |
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MAIL:uchi@sco.bekkoame.ne.jp ¡¡¡¡27830 |
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¡¡¡¡27831 |
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MAIL:masaru-y@san¡¡su.org HomePage:»»¥Á¥ã¥ì¡¡¡¡27832 |
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MAIL:sokurates2001@yahoo.co.jp ¡¡¡¡27834 |
sugitakukun |
#27817
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