名校
1 . 如图,在
中,点
在边
上,且
.记
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/7af8525b-629f-41ce-a3ab-e8a444056401.png?resizew=192)
(1)求证:
;
(2)若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/299d7fba9e66b71eef7895ab9d073354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74491945847aa130dae78e6a8cb6f914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ea718698b44ab67a5dac6206e54f0d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/7af8525b-629f-41ce-a3ab-e8a444056401.png?resizew=192)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0485afba4758035a1a93a1b8d4752852.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c95fa7f61564978c8e26616bc14449e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/841c4de47727d62aa60a33530bb6d958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc4844d3dd1b55de4c9f6c173845bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
2021-12-15更新
|
910次组卷
|
2卷引用:山东省泰安市新泰市第一中学东校2021-2022学年高三上学期期中数学试题
名校
解题方法
2 . 已知函数
,
(1)求函数
的单调递增区间;
(2)当
时,求证函数
的最小值不大于
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/840654c4b511a6a47e83549ed992e114.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fd94fd06825f3c25bd006880ef6ee79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14637d2b3236309c2fc226545d41673b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d435483e913dda7318e4bc6838c861a.png)
您最近一年使用:0次
2021-11-27更新
|
642次组卷
|
3卷引用:山东省聊城第一中学2021-2022学年高三上学期期中数学试题
山东省聊城第一中学2021-2022学年高三上学期期中数学试题山东省邹平市第一中学2021-2022学年高三上学期模拟新高考一卷数学试题(已下线)专题5.4 利用导数研究函数的最值-2021-2022学年高二数学特色专题卷(人教A版2019选择性必修第二册)
名校
3 . 如图1,梯形
中,
,过A,B分别作
,垂足分别E,F,
,已知
,将梯形
沿
同侧折起,得空间几何体
,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/a7d67002-abd6-4abd-9401-f8581ee59a84.png?resizew=398)
(1)若
,证明:
平面
;
(2)若
,线段
上是否存在一点P,使得直线
与平面
所成角的正弦值为
?若存在,求
的长;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b40d626dbb862ac3d45721ff5751731.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae5c800483cc6db6a283963beccb2dfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82773737609e65dea3c5c67099f1b10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/268544817735d20ffbceef3b26db5dde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/535770901287f244911b42412533d4a9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/a7d67002-abd6-4abd-9401-f8581ee59a84.png?resizew=398)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39b13d187b25461d85a3b8d10c7b678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6714ea2a5dc33e52d1bee37aeb9ca252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ea07c396a9883d159ce2887ce65466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
您最近一年使用:0次
2022-01-20更新
|
517次组卷
|
2卷引用:山东省实验中学2021-2022学年高二上学期期中数学试题
名校
解题方法
4 . 已知函数
.
(1)函数
在定义域内恒成立,求实数
的取值范围:
(2)求证:当
时,
;
(3)若
有两个不同的零点
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f8cd466fc33dc01e224f8d9cc097b0.png)
(1)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6acb0f1ac694dd177e99fc385f23318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eff35269d5cf9fd3649a945389041d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f61bf3dbf6a88367df72719aa56c76e.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b64b1a6ad90a44dd02e91a62f2c0364.png)
您最近一年使用:0次
2021-11-26更新
|
1859次组卷
|
4卷引用:山东省实验中学2021-2022学年高三上学期第二次诊断考试数学试题
山东省实验中学2021-2022学年高三上学期第二次诊断考试数学试题(已下线)专题35 导数中双变量与极值点偏移必刷100题-【千题百练】2022年新高考数学高频考点+题型专项千题百练(新高考适用)辽宁省沈阳市东北育才双语学校2023届高三上学期数学学科第一次模拟测试题(已下线)专题11 导数及其应用难点突破3-利用导数解决双变量问题-2
5 . 如图所示,在四棱锥
中,
底面ABCD,
,
,
,
,点E,M,H分别为棱PC,PB,PD的中点,
.求证:
![](https://img.xkw.com/dksih/QBM/2021/11/15/2851660172296192/2859010589589504/STEM/18e47239-bafc-4d85-8f5c-4bf8c6cd53e2.png)
(1)
;
(2)点A在平面MNH内.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba814113887c21637c1954f244812f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c3b457eb5e023a6b818ed6380401a45.png)
![](https://img.xkw.com/dksih/QBM/2021/11/15/2851660172296192/2859010589589504/STEM/18e47239-bafc-4d85-8f5c-4bf8c6cd53e2.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c38bbe49284a2ceab26001ced8cfd56.png)
(2)点A在平面MNH内.
您最近一年使用:0次
解题方法
6 . 在
中,内角A,B,C所对的边分别为a,b,c,已知
,
,点D在射线AC上,满足
.
(1)求
;
(2)设
的角平分线与直线AC交于点E,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91fc3570fb0b6bb12bc8c81aa5dd083a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc3fcb516ee06d76e992060334f3298b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/245a94d9b0759fdb9a3db389cc113c75.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56a15aee214fa9f744e2922ce5f64074.png)
您最近一年使用:0次
7 . 如图,在四面体
中,E,F,G,H分别是
,
,
,
的中点.
![](https://img.xkw.com/dksih/QBM/2021/11/15/2851853284515840/2857634263597056/STEM/ce9abe65-c6eb-497e-9ebe-ca02ef97e411.png?resizew=242)
(1)若
,
,求证:
;
(2)设
,O为空间中任意一点,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://img.xkw.com/dksih/QBM/2021/11/15/2851853284515840/2857634263597056/STEM/ce9abe65-c6eb-497e-9ebe-ca02ef97e411.png?resizew=242)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ee81929c987732fcb379802eeef7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e83ad09855a36ae1e8af3ecbd697db9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/371ea12c470d1461a464c01636b71f8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec1696ba7e9fc3f3b9837032c87f7fc8.png)
您最近一年使用:0次
解题方法
8 . 四棱锥
的底面
为直角梯形,
,
,
,
,且平面
平面
,
为
中点.
![](https://img.xkw.com/dksih/QBM/2021/11/17/2853313121714176/2857315322781696/STEM/b4321b35d4414536b2517fc26d93409e.png?resizew=200)
(1)求证:
;
(2)若直线
与平面
所成的角为
,求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec2d5ab801f2a84b78139b0ea2c5032b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fee21c4658f6139d9eec1db0096922f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/877582b5387278008d14fe5932622fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2021/11/17/2853313121714176/2857315322781696/STEM/b4321b35d4414536b2517fc26d93409e.png?resizew=200)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/395067319b11a704017c3c906cf383f5.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21665d21bbfb04410c78345de1fd15ae.png)
您最近一年使用:0次
解题方法
9 . 如图,三棱柱
的所有棱长都是2,
平面
,
为
的中点,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/bbac088b-4084-4c86-8e4b-c4e638b8630e.png?resizew=227)
(1)求证:直线
平面
;
(2)求直线
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/bbac088b-4084-4c86-8e4b-c4e638b8630e.png?resizew=227)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
您最近一年使用:0次
10 . 已知函数
.
(1)若
,求证:函数
是偶函数;
(2)是否存在实数
,使得
在区间
上的最小值为
?若存在,求出
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d15a9e173eeee379a53972ec01178cf2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a21aa88b247e1eaf0520abb791c737a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次