名校
解题方法
1 . 已知
.
(1)求不等式
的解集;
(2)设
、
、
为正实数,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25d006b8fc4f1ddc68b3fa582179e9f2.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a8cb96a9e39bc196289712c325265c.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7396dff61afb9a234cf52ebe8bf70eb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754a0b7002c7adda391ae9c297a64f33.png)
您最近一年使用:0次
2020-03-27更新
|
343次组卷
|
13卷引用:2016届宁夏银川二中高三三模拟理科数学试卷
2016届宁夏银川二中高三三模拟理科数学试卷2016届宁夏银川二中高三模拟三文科数学试卷2016届湖南省师大附中高三上学期月考六文科数学试卷2015-2016学年福建师大附中高二下期末数学(理)试卷安徽省“皖南八校”2018届高三第三次(4月)联考数学(理)试题【全国校级联考】安徽省“皖南八校”2018届高三第三次(4月)联考数学(文)试题2019届广东省潮州市高三第二次模拟数学(文)试题2020届四川省宜宾市叙州区第二中学校高三三诊模拟考试数学(理)试题2020届四川省宜宾市叙州区第二中学校高三三诊模拟考试数学(文)试题福建省厦门市第一中学2020届高三最后一模数学(文)试题2016届云南省师大附中高三适应性月考二理科数学试卷2016届云南省师大附中高三适应性月考二文科数学试卷云南省弥勒市第一中学2019-2020学年高二下学期第三次月考数学(文)试题
解题方法
2 . 如图,在边长为
的菱形
中,
,点
分别是边
,
的中点,
,沿
将
翻折到
,连接
,得到如图的五棱锥
,且
.
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572594296356864/1572594302189568/STEM/595dd52221884d0b978ca4c00c0d54db.png)
(1)求证:
;
(2)求四棱锥
的体积.
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572594296356864/1572594302189568/STEM/3b027be586de45979cdc327a7e4d99c8.png)
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572594296356864/1572594302189568/STEM/0082016e1eb7401b98d4bab11a50894a.png)
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572594296356864/1572594302189568/STEM/1e6b14bb0f6e4185a53b68cb96a8acb6.png)
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572594296356864/1572594302189568/STEM/c3feb915868140e18a95352b80c2fdb2.png)
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572594296356864/1572594302189568/STEM/c2f12933a828478689536ab040b9a712.png)
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572594296356864/1572594302189568/STEM/222f59756e7044e5a50a421a5aefe4bc.png)
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572594296356864/1572594302189568/STEM/bda19a455edd4091b3d93f113bc0868d.png)
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572594296356864/1572594302189568/STEM/eae90e06f38b405785b05ae0d3a9c30b.png)
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572594296356864/1572594302189568/STEM/12103783eaa146129942225d01a567f0.png)
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572594296356864/1572594302189568/STEM/64f3a1c25e734f66b7c7a15cc6aa3130.png)
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572594296356864/1572594302189568/STEM/980b9f8fd83249a4b53cc239304b79ae.png)
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572594296356864/1572594302189568/STEM/8d8f7aaadbc24e4ca33d848cdc320379.png)
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572594296356864/1572594302189568/STEM/e86654905e6741bea247cb00f15d749d.png)
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572594296356864/1572594302189568/STEM/595dd52221884d0b978ca4c00c0d54db.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572594296356864/1572594302189568/STEM/c4ee5b9076a14a2b9ca294087a12cc8a.png)
(2)求四棱锥
![](https://img.xkw.com/dksih/QBM/2016/4/14/1572594296356864/1572594302189568/STEM/cdb7f492930a407d97905c914085dc1b.png)
您最近一年使用:0次
2016-12-04更新
|
842次组卷
|
3卷引用:2016届宁夏石嘴山三中高三下三模文科数学试卷