设a,b,c是三角形的三边长,求证:a²—b²—c²+2bc>0..(这个和上边的不是一道题)已知△ABC的三边长分别为a,b,c,且满足a²+c²=2ab+2bc—2b².求证:△ABC是等边三角形
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 18:45:01
![设a,b,c是三角形的三边长,求证:a²—b²—c²+2bc>0..(这个和上边的不是一道题)已知△ABC的三边长分别为a,b,c,且满足a²+c²=2ab+2bc—2b².求证:△ABC是等边三角形](/uploads/image/z/8668122-42-2.jpg?t=%E8%AE%BEa%2Cb%2Cc%E6%98%AF%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E4%B8%89%E8%BE%B9%E9%95%BF%2C%E6%B1%82%E8%AF%81%EF%BC%9Aa%26%23178%3B%E2%80%94b%26%23178%3B%E2%80%94c%26%23178%3B%2B2bc%EF%BC%9E0..%EF%BC%88%E8%BF%99%E4%B8%AA%E5%92%8C%E4%B8%8A%E8%BE%B9%E7%9A%84%E4%B8%8D%E6%98%AF%E4%B8%80%E9%81%93%E9%A2%98%EF%BC%89%E5%B7%B2%E7%9F%A5%E2%96%B3ABC%E7%9A%84%E4%B8%89%E8%BE%B9%E9%95%BF%E5%88%86%E5%88%AB%E4%B8%BAa%2Cb%2Cc%2C%E4%B8%94%E6%BB%A1%E8%B6%B3a%26%23178%3B%2Bc%26%23178%3B%3D2ab%2B2bc%E2%80%942b%26%23178%3B.%E6%B1%82%E8%AF%81%EF%BC%9A%E2%96%B3ABC%E6%98%AF%E7%AD%89%E8%BE%B9%E4%B8%89%E8%A7%92%E5%BD%A2)
xRJ@|ARv\.Ow $ZX(EmlߥlNy!DڃK ;䁟^~xNa[y#K+k3C+eyxaFz7Q4;n:d*v 2QTNVl/wn:w?y~W%SjP)5j (26!Lؔ\|
收录互联网各类作业题目,免费共享学生作业习题
头条考试网手机作业共收录了 千万级 学生作业题目
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 18:45:01