名校
1 . 已知函数
.
(1)若对于任意的
,均有
,证明:
;
(2)当
时,证明:对于任意的
,
成立的充分必要条件为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/228ec94a217b7fab0cfe5e23a891a403.png)
(1)若对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66d61d5f66d68b4c4a2a25fd7103621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60e333ce67e47ca86f2737c6426e00c6.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731bdc8d2686a05f12a2ba8a7e3b01be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7dbb416ec1ff1984a724a4f48bf692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/366839b25310cb3168d411b1d5f73b06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b41da54debbb3f80eddedf2d0eacf4.png)
您最近一年使用:0次
2018-12-04更新
|
172次组卷
|
2卷引用:2016年全国高中数学联赛江苏赛区复赛试题
14-15高三上·江苏苏州·阶段练习
名校
解题方法
2 . 如图,在四面体
中,
,点
是
的中点,点
在线段
上,且
.
![](https://img.xkw.com/dksih/QBM/2014/9/15/1571853775446016/1571853781057536/STEM/3fc8a4a257c84cf79e3185674f21220a.png?resizew=163)
(1)若
平面
,求实数
的值;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/499e6009ac18b5770ff0bd96af67c56d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a97d735a5a39a8243dbb93baa9d9089a.png)
![](https://img.xkw.com/dksih/QBM/2014/9/15/1571853775446016/1571853781057536/STEM/3fc8a4a257c84cf79e3185674f21220a.png?resizew=163)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c309e58bf083bad13abd549720a63a22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e649e04994df61bf49c1c6599c3e7530.png)
您最近一年使用:0次
2016-12-03更新
|
1502次组卷
|
4卷引用:2015届江苏省广宇学校高三年级百强生竞赛文科数学试卷
2015届江苏省广宇学校高三年级百强生竞赛文科数学试卷2015届江苏省广宇学校高三年级百强生竞赛理科数学试卷(已下线)2015届江苏省苏州市高三9月调研考试数学试卷【全国百强校】江苏省海安高级中学2019届高三上学期第二次月考数学试题