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7·î2Æü¡Ê¶â¡Ë 21:45:47¡¡¡¡
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¿Þ¤òºÂɸ¤Ë A(-5,0),Q(0,0),C(2*a,0),P(-a/2,-sqrt(3)*a/2)¤ÈÃÖ¤¯¤³¤È¤Ë¤·¤¿¡£ ¤³¤³¤ÇÅÀA,P¤òÄ̤ëľÀþ¤òµá¤á¤ë¤È e1:-sqrt(3)*a/2=k*-a/2+l$ e2:0=k*-5+l$ solve([e2,e3],[k,l]);k=sqrt(3)*a/(a-10),l=5*sqrt(3)*a/(a-10) ľÀþAP:y=sqrt(3)*a*x/(a-10)+5*sqrt(3)*a/(a-10) ¤³¤ì¤Èx^2+y^2=25¤È¤Î¸òÅÀ¤¬B¤Ê¤Î¤Ç¤½¤ì¤òµá¤á¤ë¤È e3:y=sqrt(3)*a*x/(a-10)+5*sqrt(3)*a/(a-10)$ e4:x^2+y^2=25$ solve([e3,e4],[x,y]);x=-(5*a^2+50*a-250)/(2*a^2-10*a+50),y=(5*sqrt(3)*a^2-50*sqrt(3)*a)/(2*a^2-10*a+50) ¤³¤ÎÅÀ¤È(2*a,0)¤È¤Îµ÷Î¥¤Ï factor((2*a+(5*a^2+50*a-250)/(2*a^2-10*a+50))^2+(0-(5*sqrt(3)*a^2-50*sqrt(3)*a)/(2*a^2-10*a+50))^2); 25*(a-10)^2/(a^2-5*a+25)¡¡¤è¤ê 5*(10-a)^2/sqrt(a^2-5*a+25) ÅÀB¤È(-5,0)¤È¤Îµ÷Î¥¤Ï factor((-5+(5*a^2+50*a-250)/(2*a^2-10*a+50))^2+(0-(5*sqrt(3)*a^2-50*sqrt(3)*a)/(2*a^2-10*a+50))^2); (4*a^4-10*a^3+225*a^2-625*a+625)/(a^2-5*a+25)¡¡¤è¤ê sqrt(4*a^4-10*a^3+225*a^2-625*a+625)/sqrt(a^2-5*a+25) ¤³¤³¤Ç¢¤ABC¤Ë;¸¹ÄêÍý¤ò»ÈÍѤ·¤Æ (2*a+5)^2=25*(a-10)^2/(a^2-5*a+25)+(4*a^4-10*a^3+225*a^2-625*a+625)/(a^2-5*a+25)-(5*(10-a)/sqrt(a^2-5*a+25))*(sqrt(4*a^4-10*a^3+225*a^2-625*a+625)/sqrt(a^2-5*a+25)) ¤³¤ì¤òmupad light 2.5.3 ¤Ç²ò¤¯¤È solve((2*a+5)^2=25*(a-10)^2/(a^2-5*a+25)+(4*a^4-10*a^3+225*a^2-625*a+625)/(a^2-5*a+25)-(5*(10-a)/sqrt(a^2-5*a+25))*(sqrt(4*a^4-10*a^3+225*a^2-625*a+625)/sqrt(a^2-5*a+25)),a); a=10(ÉÔŬ),5/3¡¦¡¦¡¦¡¦¡¦¡¦¡ÊÅú¤¨¡Ë |
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