求证解答题
来源:学生作业帮 编辑:搜搜考试网作业帮 分类:数学作业 时间:2024/07/13 02:45:43
设4x-y为3的倍数,求证:4乘x的平方+7xy-2乘y的平方能被9整除
![](http://img.wesiedu.com/upload/8/8a/88aee21b970ae40ceb775b17605c4ca7.jpg)
![](http://img.wesiedu.com/upload/8/8a/88aee21b970ae40ceb775b17605c4ca7.jpg)
![求证解答题](/uploads/image/z/6444686-38-6.jpg?t=%E6%B1%82%E8%AF%81%E8%A7%A3%E7%AD%94%E9%A2%98)
解题思路: 根据题意,由因式分解的知识可求
解题过程:
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![](http://img.wesiedu.com/upload/8/8a/88aee21b970ae40ceb775b17605c4ca7.jpg)
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=872984")}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")}*/}}}
![](http://img.wesiedu.com/upload/8/8a/88aee21b970ae40ceb775b17605c4ca7.jpg)
最终答案:略