ÌâÄ¿ÄÚÈÝ
£¨±¾Ð¡ÌâÂú·Ö14·Ö£©ÒÑÖª£ºÈçͼ£¬Å×ÎïÏß
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/18/106438.gif)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/19/106439.gif)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/0/106440.gif)
£¨1£©Çó¸ÃÅ×ÎïÏߵĽâÎöʽ£»
£¨2£©µãPÊÇÏ߶ÎABÉϵĶ¯µã£¬¹ýµãP×÷PD¡ÎBC£¬½»ACÓÚµãD£¬Á¬½ÓCP£®µ±¡÷CPDµÄÃæ»ý×î´óʱ£¬ÇóµãPµÄ×ø±ê£»
£¨3£©ÈôƽÐÐÓÚxÖáµÄ¶¯Ö±Ïß
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/1/106441.gif)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/2/106442.gif)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/1/106441.gif)
£¨1£©
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/4/106444.gif)
£¨2£©
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/5/106445.gif)
£¨3£©
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/6/106446.gif)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/7/106447.gif)
£¨1£©ÓÉÌâÒ⣬µÃ
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/8/106448.gif)
½âµÃ
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/9/106449.gif)
¡àËùÇóÅ×ÎïÏߵĽâÎöʽΪ£º
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/4/106444.gif)
(2)ÉèµãPµÄ×ø±êΪ(x£¬0)£¬¹ýµãD×÷DG¡ÍxÖáÓÚµãG£®
¡àÓÉ
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/11/106451.gif)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/12/106452.gif)
¡àµãAµÄ×ø±êΪ£¨2£¬0£©£¬µãBµÄ×ø±êΪ£¨-4£¬0£©£®.¡¡4·Ö
¡àAB=6£¬BP=2-x£®
¡ßµãPÔÚÏ߶ÎABÉÏ£¬
¡à
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/13/106453.gif)
¡ßPD¡ÎBC£¬
¡à¡÷APD¡×¡÷ABC
¡à
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/14/106454.gif)
¼´
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/15/106455.gif)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/16/106456.gif)
¡à
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/17/106457.gif)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/18/106458.gif)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/19/106459.gif)
ÓÖ
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/13/106453.gif)
¡àµ±
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/1/106461.gif)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/2/106462.gif)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/5/106445.gif)
£¨3£©´æÔÚ£®
ÔÚ¡÷OMFÖУ®
¢ÙÈôMO=MF£¬¡ßB£¨-4£¬0£©£¬M£¨-2£¬0£©£¬¹ÊBM=OM=MF=2£®
ÓÖÔÚRt¡÷BOCÖУ¬OB=OC=4£¬¡à¡ÏOBC=45¡ã£®¡à¡ÏMFB=¡ÏOBC=45¡ã£®
¡à¡ÏBMF=90¡ã£®´Ëʱ£¬µãFµÄ×ø±êΪ£¨-2£¬-2£©£®
ÓÉ
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/4/106464.gif)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/5/106465.gif)
´Ëʱ£¬µãQµÄ×ø±êΪ£º
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/6/106446.gif)
¢ÚÈôOF=MF£¬¹ýµãF×÷FE¡ÍxÖáÓÚµãE£¬
ÓɵÈÑüÈý½ÇÐεÄÐÔÖʵãº
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/7/106467.gif)
¡àÔÚµÈÑüÖ±½Ç¡÷BEFÖУ¬EF=BE=3£®¡àF£¨-1£¬-3£©£®
ÓÉ
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/8/106468.gif)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/9/106469.gif)
´Ëʱ£¬µãQµÄ×ø±êΪ£º
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/7/106447.gif)
¢ÛÈôOM=OF£¬¡ßOB=OC=4£¬ÇÒ¡ÏBOC=90¡ã£¬¡à
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/11/106471.gif)
¡àµãOµ½BCµÄ¾àÀëΪ
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/12/106472.gif)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/12/106472.gif)
´Ëʱ£¬²»´æÔÚÕâÑùµÄÖ±Ïß
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/1/106441.gif)
×ÛÉÏËùÊö£¬´æÔÚÕâÑùµÄÖ±Ïß
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/1/106441.gif)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/6/106446.gif)
![](http://thumb.1010pic.com/pic1/imagenew2/czsx/7/106447.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿