名校
解题方法
1 . 如图,在四棱锥
中,
平面
,底面
为直角梯形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/afa1c05e-6677-4656-b1b1-7f92ac57131d.png?resizew=210)
(Ⅰ)求证:
;
(Ⅱ)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63c0c7166668d5b336bbcdc60a732641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/afa1c05e-6677-4656-b1b1-7f92ac57131d.png?resizew=210)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5578cd49feb7c846f087b041371c3875.png)
(Ⅱ)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0a31267930e2858d1899bc55ab87ee.png)
您最近一年使用:0次
2020-09-04更新
|
1039次组卷
|
3卷引用:云南省保山市2019-2020学年高二教学质量监测考试文科数学试题
2 . 如图,在四棱锥
中,
,
,
,
平面
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2020/8/26/2536414326530048/2542609594982400/STEM/38505d40228b43928cebb868018b97ef.png?resizew=208)
(Ⅰ)证明:
平面
;
(Ⅱ)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99da52604d90b4772725a2632a39dbb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ae8a050d7159d4296c2409e5bc0bf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a8256dc97e0101783f83159d35eeadf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9143934f4635574d5611ffd05a650ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2020/8/26/2536414326530048/2542609594982400/STEM/38505d40228b43928cebb868018b97ef.png?resizew=208)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5074511de93a6b92a6d74c44378ee918.png)
您最近一年使用:0次
2020-09-04更新
|
626次组卷
|
2卷引用:云南省保山市2019-2020学年高二教学质量监测考试理科数学试题
名校
3 . 如图,直三棱柱
中,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3632f5c9dd9908bce6b8eda06d57fb2.png)
,D,E分别是BC,
的中点.
![](https://img.xkw.com/dksih/QBM/2020/8/8/2523554020941824/2525481603702784/STEM/72f04eecf1034e228d137ff89957db3c.png?resizew=170)
(1)证明:
平面ADE;
(2)若
,求平面
与平面
所成二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3632f5c9dd9908bce6b8eda06d57fb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2020/8/8/2523554020941824/2525481603702784/STEM/72f04eecf1034e228d137ff89957db3c.png?resizew=170)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/565133e91e3ace2b2187cfc6f1db5be6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
您最近一年使用:0次
2020-08-11更新
|
208次组卷
|
2卷引用:云南省昆明一中教育集团2021届高二升高三诊断性考试理科数学试题
名校
解题方法
4 . 已知函数
.
(1)若
,求实数
的取值范围;
(2)设
,数列
的前n项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c299e49944949fa518d72273f92cd29.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55fbb507f0ff4a70829f8cf2de56294d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/819eed9f6c802aecc4beb4fce79e7198.png)
您最近一年使用:0次
名校
5 . 已知函数
.
(1)求函数
的单调区间;
(2)证明:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef278509c5a53f41402ecf1785c883e.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ede78fd7ac619ea597856254bb5d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9e0634aeb1c893df06a00736c9c8d8.png)
您最近一年使用:0次
2020-08-11更新
|
454次组卷
|
2卷引用:云南省昆明一中教育集团2021届高二升高三诊断性考试文科数学试题
名校
解题方法
6 . 如图,直三棱柱
中,
,
,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/2020/8/8/2523553927004160/2525296715276288/STEM/ef56235768a945b78467f4a6bc134281.png?resizew=221)
(1)证明:
平面
;
(2)求三棱锥
的高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90e17995e2f71e297d94ae51c7e5b1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2020/8/8/2523553927004160/2525296715276288/STEM/ef56235768a945b78467f4a6bc134281.png?resizew=221)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/565133e91e3ace2b2187cfc6f1db5be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d589c7f5ed8b617abed55067bd833ab.png)
您最近一年使用:0次
名校
解题方法
7 . 已知点
和直线
,设动点
到直线
2的距离为d,且
.
(1)求点M的轨迹E的方程;
(2)已知
,若直线
与曲线E交于A,B两点,设点A关于x轴的对称点为C,证明:P、B、C三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f36374ce95a4945d0e58264c2b271f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d259822ab64b8626f3893b8432673358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7859abafc86cfcbfd3ea122d0148750.png)
(1)求点M的轨迹E的方程;
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/328aaba77106396d4ca644c8b7a352e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3348aa4cbf8f53e4ba7247acc94da5b.png)
您最近一年使用:0次