Æ»¹û4sµÄ26¸ñ¼üÅ̵ÄPλÖÃû·´Ó¦Ôõô°ì?µã²»µ½,ÓеÄʱºòµãP...

Æ»¹û4sµÄ26¸ñ¼üÅ̵ÄPλÖÃû·´Ó¦Ôõô°ì?µã²»µ½,ÓеÄʱºòµãP»á°Ñoµã³öÀ´,ÕâÊÇΪʲô,Çó´óÉñ°ïæ! ...


...S¡÷PAB=54S¡÷MAB?Èô´æÔÚ,Çó³öPµãµÄ×ø±ê;Èô²»

½â´ð:½â:(1)ÒòΪM(1,-4)ÊǶþ´Îº¯Êýy=(x+m)2+kµÄ¶¥µã×ø±ê,ËùÒÔy=(x-1)2-4=x2-2x-3,Áîx2-2x-3=0,½âÖ®µÃx1=-...


...µÄ½»µã.¢ÙÈôµãPÔÚÅ×ÎïÏßÉÏ,ÇÒS¡÷POC=4S¡÷BOC

(1)¡ß¶Ô³ÆÖáΪֱÏßx=-1µÄÅ×ÎïÏßy=ax2+bx+c(a¡Ù0)ÓëxÖáÏཻÓÚA¡¢BÁ½µã,¡àA¡¢BÁ½µã¹ØÓÚÖ±Ïßx=-1¶Ô³Æ,¡ßµãAµÄ×ø±êΪ(-3...


...µÄµç¸ºÐÔËæÔ­×ÓÐòÊýµÄÔö´ó¶øÔö´óB.¼Ûµç×ÓÅŲ¼Îª4s...

½â´ð:½â:A.ͬÖ÷×åÔªËØ´ÓÉϵ½ÏÂ,µç¸ºÐÔ¼õС,ÔòN¡¢P¡¢AsµÄµç¸ºÐÔËæÔ­×ÓÐòÊýµÄÔö´ó¶ø¼õС,¹ÊA´íÎó;B.¼Ûµç×ÓÅŲ¼Îª4s24p3µÄÔªËØÓÐ...


...Å×ÎïÏßÉÏ,a=1,ÇÒS¡÷POC=4S¡÷BOC,ÇóµãPµÄ×ø±ê

(1)¡ß¶Ô³ÆÖáΪx=-1,Aµã×ø±êΪ(-3,0),¡àBµã×ø±êΪ(1,0);(2)ÓÉÌõ¼þÆä¶Ô³ÆÖáΪx=-1,¼´-b2a=-1,µ±a=1ʱ,´úÈë¿ÉÇó...


.../(4!)ÎÒÖªµÀ.ÁíÒ»ÖÖÏë·¨:ÏÈÅÅ4s,Ò»ÖÖ;ÔÙÅÅ4I,²å·ì...

ÔÙÅÅ4I,²å·ì,5^4;ÄãµÄ²å·ì²»¶Ô,±ÈÈçµÚÒ»¸öºÍµÚ¶þ¸öi·ÅÔÚµÚÒ»¸ösÇ°µÚÈýµÚËĸöi·ÅÔÚµÚÒ»¸ösºóºÍ±ÈÈçµÚÈý¸öºÍµÚËĸöi·ÅÔÚ...


...¼×µÄÕñ·ùΪ3cm,ÒÒµÄÕñ·ùΪ2cm,ËüÃǵÄÖÜÆÚ¶¼Îª4s.µ±...

ÓÉÌâÒâ¿ÉÖª,¼×µÄÕñ·ùΪ3cm,ÖÜÆÚΪ4s,ÔòԲƵÂÊΪ:¦Ø=2¦ÐT=2¦Ð4=0.5¦Ðrad/s;t=0ʱ¿Ìʱ,¼×´¦ÓÚ×î´óλÒÆ´¦,ËùÒÔ¼×µÄÕñ¶¯·½³Ì...


...ºËÍâµç×ÓÅŲ¼×ñÑ­µÄ¹æÂÉ¢Ú4s¹ìµÀµÄÄÜÁ¿Ò»¶¨±È3d...

¢ÙÔ­×ӵĵç×ÓÅŲ¼×ñÑ­¹¹ÔìÔ­ÀíÄÜʹÕû¸öÔ­×ÓµÄÄÜÁ¿´¦ÓÚ×îµÍ״̬,µ«¹ìµÀ³äÂú»ò°ë³äÂúʱ,ÄÜÁ¿½ÏС,ÈçCu:3d104s1,Cr:3d54s1,²»×ñÑ­..


4SÏÈÉú¡¢PÏÈÉú¡¢QÏÈÉúËûÃÇÖªµÀ×À×ӵijéÌëÀïÓÐ16ÕÅÆË¿Ë...

4SÏÈÉú¡¢PÏÈÉú¡¢QÏÈÉúËûÃÇÖªµÀ×À×ӵijéÌëÀïÓÐ16ÕÅÆË¿ËÅÆ:ºìÌÒA¡¢Q¡¢4 ºÚÌÒJ¡¢8¡¢4¡¢2¡¢7¡¢3 ²Ý»¨K¡¢Q¡¢5¡¢4¡¢6 ·½¿éA¡¢5¡£Ô¼º²½ÌÊÚ...


...FCE,EF½»ADÓÚP,ÇóÖ¤SÈý½ÇÐÎAEP=4SÈý½ÇÐÎPDF

m;¹ÊDF/AE=[(1/2)m]/m=1/2.ABƽÐÐÓÚDF,Ôò¨SAEP¡×¨SDFP,S¨SAEP/S¨SPDF=(DF/AE)^2=1/4,¼´:S¨SAEP=4S¨SPDF....


Ïà¹ØËÑË÷

ÈÈÃÅËÑË÷