天气预报15天查询> 财经> 拐点什么意思

拐点什么意思

更新时间: 2021-04-22 07:08:20     

1、拐点,又称反曲点,在数学上指改变曲线向上或向下方向的点,直观地说拐点是使切线穿越曲线的点(即连续曲线的凹弧与凸弧的分界点)。若该曲线图形的函数在拐点有二阶导数,则二阶导数在拐点处异号(由正变负或由负变正)或不存在。

2、高等数学上指曲线上凸与下凹的分界点。经济学上指某种经济数值持续向高后转低或持续向低后转高的转折点:经济运行出现回升。

关键词: 什么 意思

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-610796/ | 耗时:0.4060 s | 内存:1.89 MB | 查询:5 | 缓存读取:4 写入:1 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=610796 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=610796 LIMIT 0,1
SELECT * FROM tbl_categories where CategoryID=90022 LIMIT 0,1
select * from tbl_Articles_sphinx where id=610796 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(592492,507969,724870,1190281,1112341,1196711,710921,564268,1190344,1096255,2235852,1129906,2096833,918884,829594,1203599,2136937,758295,543958,985071,1104789,1027564,1199306,622260,960167,762671,918826,3502711,1153416,3339662) ORDER BY field (ArticleID,592492,507969,724870,1190281,1112341,1196711,710921,564268,1190344,1096255,2235852,1129906,2096833,918884,829594,1203599,2136937,758295,543958,985071,1104789,1027564,1199306,622260,960167,762671,918826,3502711,1153416,3339662)