财经 返回
天气预报 > 财经 > 椭圆离心率e和斜率k的关系
椭圆离心率e和斜率k的关系
更新时间： 2021-04-01 12:35:25  

在双曲线中,e=c/a,而a^2+b^2=c^2,所以b/a=√（c^2-a^2)/a=√(c^2/a^2-1)=√(e^2-1),所以e越大,b/a也越大,即渐近线y=±b/a*x的斜率k的绝对值越大,这时双曲线的形状就从扁狭逐渐变得开阔,由此可知,双曲线的离心率越大,它的开口就越阔。

关键词： 椭圆 心率 斜率 关系

椭圆离心率e和斜率k的关系相关经验

天气预报

最新推荐

页面:/news/view-742466/ | 耗时:0.1676 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=742466 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=742466 LIMIT 0,1
select * from tbl_Articles_sphinx where id=742466 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(391284,1017824,2167226,707294,478724,476762,1668515,436732,374405,1157405,978443,889998,959866,1589133,479483,1280389,1631466,500868,948416,1487147,693649,987418,678760,566735,721593,1568169,978205,789591,1399229,376570) ORDER BY field (ArticleID,391284,1017824,2167226,707294,478724,476762,1668515,436732,374405,1157405,978443,889998,959866,1589133,479483,1280389,1631466,500868,948416,1487147,693649,987418,678760,566735,721593,1568169,978205,789591,1399229,376570)