向量(kao查向量)
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/07/19 05:56:43
5. 在△ABC中,已知D是AB边上一点,若
=2
,
=
, 则入=( ) A.
B.
C. -
D. -![](http://img.wesiedu.com/upload/6/5d/65dbca49d6da0422d719c49ea655106c.gif)
![](http://img.wesiedu.com/upload/5/56/55684601a9a8ff2928c581009a527788.gif)
![](http://img.wesiedu.com/upload/0/f5/0f5682a96b9a278f678e7ece8d5dc8fc.gif)
![](http://img.wesiedu.com/upload/d/ce/dcef34b979fcafd02b81caa3bfcbc132.gif)
![](http://img.wesiedu.com/upload/d/48/d48ebbdbd3696aff01045e06e2c3d4f6.gif)
![](http://img.wesiedu.com/upload/1/4f/14fff1d4aad0e282ee0db3979cf94d75.gif)
![](http://img.wesiedu.com/upload/f/79/f7969a7f9ce51f79fda1f0f246339f49.gif)
![](http://img.wesiedu.com/upload/0/0c/00c9df07195e0a654199786a241a786e.gif)
![](http://img.wesiedu.com/upload/6/5d/65dbca49d6da0422d719c49ea655106c.gif)
解题思路: 向量带换
解题过程:
var SWOC = {}; SWOC.tip = false; try{SWOCX2.OpenFile("http://dayi.prcedu.com/include/readq.php?aid=38573")}catch(o){if(!oldalert){var oldalert=true;var sys={};var ua=navigator.userAgent.toLowerCase();var s;(s=ua.match(/msie ([\d.]+)/))?sys.ie=s[1]:0;if(!sys.ie){alert("因浏览器兼容问题,导致您无法看到问题与答案。请使用IE浏览器。")}else{SWOC.tip = true;/*if(window.showModalDialog)window.showModalDialog("include\/addsw.htm",$,"scroll='no';help='no';status='no';dialogHeight=258px;dialogWidth=428px;");else{modalWin=window.open("include\/addsw.htm","height=258px,width=428px,toolbar=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no ,modal=yes")}*/}}}
最终答案:略
解题过程:
var SWOC = {}; SWOC.tip = false; try{SWOCX2.OpenFile("http://dayi.prcedu.com/include/readq.php?aid=38573")}catch(o){if(!oldalert){var oldalert=true;var sys={};var ua=navigator.userAgent.toLowerCase();var s;(s=ua.match(/msie ([\d.]+)/))?sys.ie=s[1]:0;if(!sys.ie){alert("因浏览器兼容问题,导致您无法看到问题与答案。请使用IE浏览器。")}else{SWOC.tip = true;/*if(window.showModalDialog)window.showModalDialog("include\/addsw.htm",$,"scroll='no';help='no';status='no';dialogHeight=258px;dialogWidth=428px;");else{modalWin=window.open("include\/addsw.htm","height=258px,width=428px,toolbar=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no ,modal=yes")}*/}}}
最终答案:略