轨迹
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/10 15:19:13
已知圆A:(x+2)^2+y^2=1与定直线l:x=1,且动圆P和圆A外切并与直线l相切,则动圆的圆心P的轨迹方程是() A:y^2=-8x B:y^2=8x C:y^2=-4x D:y^2=4x
解题思路: 抛物线
解题过程:
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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=581594")}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