ÌâÄ¿ÄÚÈÝ

£¨2013•·îÏÍÇøһģ£©ÔÚƽÃæÖ±½Ç×ø±êϵxOyÖУ¬¶ÔÓÚÈÎÒâÁ½µãP1£¨x1£¬y1£©ÓëP2£¨x2£¬y2£©µÄ¡°·Ç³£¾àÀ롱¸ø³öÈç϶¨Ò壺Èô|x1-x2|¡Ý|y1-y2|£¬ÔòµãP1ÓëµãP2µÄ¡°·Ç³£¾àÀ롱Ϊ|x1-x2|£¬Èô|x1-x2|£¼|y1-y2|£¬ÔòµãP1ÓëµãP2µÄ¡°·Ç³£¾àÀ롱Ϊ|y1-y2|£®ÒÑÖªCÊÇÖ±Ïßy=
3
4
x+3ÉϵÄÒ»¸ö¶¯µã£¬µãDµÄ×ø±êÊÇ£¨0£¬1£©£¬ÔòµãCÓëµãDµÄ¡°·Ç³£¾àÀ롱µÄ×îСֵÊÇ
8
7
8
7
£®
·ÖÎö£ºÏÈÉèC£¨x£¬
3
4
x+3£©£¬¸ù¾Ý|x1-x2|¡Ý|y1-y2|£¬ÔòµãP1ÓëµãP2µÄ¡°·Ç³£¾àÀ롱Ϊ|x1-x2|¡±Öª£¬C¡¢DÁ½µãµÄ¡°·Ç³£¾àÀ롱µÄ×îСֵΪ-x0=
3
4
x0+2£¬¾Ý´Ë¿ÉÒÔÇó
½â´ð£º½â£ºÈçͼȡµãCÓëµãDµÄ¡°·Ç³£¾àÀ롱µÄ×îСֵʱ£¬ÐèÒª¸ù¾ÝÔËË㶨Òå¡°Èô|x1-x2|¡Ý|y1-y2|£¬
ÔòµãP1ÓëµãP2µÄ¡°·Ç³£¾àÀ롱Ϊ|x1-x2|¡±½â´ð£¬´Ëʱ|x1-x2|=|y1-y2|£®
¼´AC=AD£¬
¡ßCÊÇÖ±Ïßy=
3
4
x
+3ÉϵÄÒ»¸ö¶¯µã£¬µãDµÄ×ø±êÊÇ£¨0£¬1£©£¬
¡àÉèµãCµÄ×ø±êΪ£¨x0£¬
3
4
x0+3£©£¬
¡à-x0=
3
4
x0
+2£¬
´Ëʱ£¬x0=-
8
7

¡àµãCÓëµãDµÄ¡°·Ç³£¾àÀ롱µÄ×îСֵΪ£º|x0|=
8
7

¹Ê´ð°¸Îª£º
8
7

µãÆÀ£º±¾ÌâÒÔж¨ÒåΪÔØÌ壬Ö÷Òª¿¼²éÁ˾àÀ빫ʽµÄ¼òµ¥Ó¦Óã¬ÊôÓÚ»ù´¡ÊÔÌâ
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø