天气预报 > 其他 > x平方为什么要大于等于0
x平方为什么要大于等于0
更新时间: 2020-10-03 00:00:00  

因为x的平方表示两个相同的数相乘,而两个相同的数必定符号也相同,根据最基本的数学定理,两数相乘若两数同号则为正,异号为负,而x的平方,x可以取零,所以x的平方大于等于零。

关键词: 平方 为什么 大于 等于

x平方为什么要大于等于0相关经验

天气预报

最新推荐

页面:/news/view-355316/ | 耗时:0.4505 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=355316 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=355316 LIMIT 0,1
select * from tbl_Articles_sphinx where id=355316 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(385810,1120292,1127381,1095063,1126524,385776,1283258,529912,186900,242911,408157,249014,216964,1100931,202813,1102443,107963,1122436,252605,277622,275756,512876,186149,1085172,142135,1008730,157708,287568,1276118,1103234) ORDER BY field (ArticleID,385810,1120292,1127381,1095063,1126524,385776,1283258,529912,186900,242911,408157,249014,216964,1100931,202813,1102443,107963,1122436,252605,277622,275756,512876,186149,1085172,142135,1008730,157708,287568,1276118,1103234)