名校
解题方法
1 . 如图,在四棱锥
中,底面
是正方形.点
是棱
的中点,平面
与棱
交于点
.
![](https://img.xkw.com/dksih/QBM/2016/3/4/1572517709578240/1572517715451904/STEM/1e90fcac06ab48bd8042e6a79549940c.png)
(1)求证:
;
(2)若
,且平面
平面
,试证明
平面
;
(3)在(2)的条件下,线段
上是否存在点
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
平面
?(直接给出结论,不需要说明理由)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6153163fecdf3f410411048428ccaef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2016/3/4/1572517709578240/1572517715451904/STEM/1e90fcac06ab48bd8042e6a79549940c.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c91baecb97fadd4f8ab49e6effcbc04.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f6967901d6c855864df01e7bf7a15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3321ddb3483d7576d719d5b929f9bd87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cac0572ffc70fbe6676edea45559904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(3)在(2)的条件下,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4237f6a1fc115bb790aa10704b7908c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2016-12-04更新
|
736次组卷
|
3卷引用:内蒙古鄂尔多斯市第一中学2018-2019学年高二下学期第一次月考数学(文)试题
名校
解题方法
2 . 如图所示,M、N、P分别是正方体ABCD-A1B1C1D1的棱AB、BC、DD1上的点.
(1)若,求证:无论点P在DD1上如何移动,总有BP⊥MN;
(2)棱DD1上是否存在这样的点P,使得平面APC1⊥平面ACC1?证明你的结论.
您最近一年使用:0次
2016-12-04更新
|
626次组卷
|
4卷引用:【全国百强校】内蒙古鄂尔多斯市第一中学2018-2019学年高二上学期期中考试模拟数学(文)试题
3 . 如图,在正方体
中,
,点E,F分别为
的中点,点G在
上.
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49bc70cf1e4f89142cccea300673acf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/408871c2b71ef88d6f556ce53cf73cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55537f7dbac74c17fe0dc386dcdab3fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ffc3552dd835a9ee6022bb11397a1bd.png)
您最近一年使用:0次
解题方法
4 . 已知函数
.
(1)当
时,求
在区间
上的最值;
(2)若
有两个不同的零点
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e9f45f86ee4cac88d16435393c7cec.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b448fe164c2c2931805e3b3847dcdd75.png)
(2)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/29909a4fdb8764b59f28bb63ce8da9db.png)
您最近一年使用:0次
2023-12-07更新
|
433次组卷
|
4卷引用:内蒙古鄂尔多斯市西四旗2024届高三上学期期末综合模拟数学(理)试题
解题方法
5 . 在
中,已知
,N是BC的中点,M是
的外心.
(1)若
,求AN的长.
(2)当
变化时,猜一个理想角
,使得易求
的值,并证明对任意的
,
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b22c64cfb042014a6b538ab1a0276d14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1905448d38b7465423fe637d700f1552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1905448d38b7465423fe637d700f1552.png)
您最近一年使用:0次
解题方法
6 . 已知圆
.
(1)求证:该圆恒过一定点;
(2)若该圆与圆
相切,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64668afd8781b54c6ccea9bc7da06562.png)
(1)求证:该圆恒过一定点;
(2)若该圆与圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
名校
解题方法
7 . 已知函数
.
(1)求不等式
的解集;
(2)若函数
的最小值为
,且
(
,
).求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85b50630b1a608365c1ae64f9d08d16.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ec4add31dd4c2d48aadbb7bd13e607.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab04de6651256f6281e9f4c1dc3c7955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75743cce419484fc8b59ec5008930b7.png)
您最近一年使用:0次
2023-11-26更新
|
277次组卷
|
5卷引用:内蒙古鄂尔多斯市西四旗2024届高三上学期期末综合模拟数学(理)试题
解题方法
8 . 已知偶函数
的定义域为
,
.
(1)求实数
的值;
(2)判断
的单调性,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec30197312caa28d01dc14d09ea7f39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ea4920997d311ea03e7ba00d0c0ae0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57a1b905a9d9942340f3a884a8f1045b.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b15ad2b838897bc489b79cebdef3e8e.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
您最近一年使用:0次
9 . 如图
,在
中,
分别为
的中点,
为
的中点,
,
.将
沿
折起到
的位置,使得平面
平面
,如图
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/62276dd9-eaa0-4b09-bcba-ff3e6520bc0b.png?resizew=325)
(1)求证:
.
(2)线段
上是否存在点
,使得直线
和
所成角的余弦值为
?若存在,求出
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0117046e7a37bebe0c7b987a00d2bcb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa2a83fed9bf4cb09d84a980452e346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b3e7c7845a0ec3cbac709fda131764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c42bce098904b241986bb91c65ab33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/62276dd9-eaa0-4b09-bcba-ff3e6520bc0b.png?resizew=325)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e51c4114e94bceb198403c1858b9682.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a261474cc7607d31a6324cb4df9c8896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c741af321a8ddaf387fa661f3920ad84.png)
您最近一年使用:0次
2023-11-16更新
|
402次组卷
|
3卷引用:内蒙古鄂尔多斯市西四旗2024届高三上学期期末综合模拟数学(理)试题
名校
10 . 如图,在直三棱柱
中,
,
,D,E,F分别为
,
,
的中点.
(1)证明:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b1dd6a2307bec9e90772a576c349db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edec2f32ea20a5c395064c59b3bf3303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2199fc9c55f7cae23311577293b1483.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df3b74e801614d33ec30efe04d91313c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20b4db82db9ffb885e99b729ef347a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/28/e53687d8-a626-4543-8188-f527e646b651.png?resizew=142)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073a88b42836fb88433679932b48ad03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb162f6c6bd4ddedf3a1cbba007e1b05.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e4dd6baf95be502586df9f93582ddc9.png)
您最近一年使用:0次
2023-10-10更新
|
1058次组卷
|
14卷引用:内蒙古自治区鄂尔多斯市鄂托克旗四校联考2023-2024学年高二上学期期中数学试题
内蒙古自治区鄂尔多斯市鄂托克旗四校联考2023-2024学年高二上学期期中数学试题陕西省榆林市府谷中学2023-2024学年高二上学期9月月考数学试题河南省洛阳市强基联盟2023-2024学年高二上学期10月联考数学试题福建省永安市第九中学2023-2024学年高二上学期第一次月考测试数学试题陕西省西安市周至县第四中学2023-2024学年高三上学期第一次模拟考试理科数学试题河北省沧州市运东七县部分学校2023-2024学年高二上学期期中联考数学试题云南省楚雄东兴中学2023-2024学年高二上学期10月月考数学试题湖北省鄂州市部分高中教科研协作体2023-2024学年高二上学期11月期中考试数学试题广东省佛山市H7教育共同体2023-2024学年高二上学期数学联考试题河北省石家庄第十五中学2023-2024学年高二上学期期中数学试题河北省邯郸市五校2023-2024学年高二上学期二调考试(12月)数学试题河北省沧州市吴桥县吴桥中学2023-2024学年高二上学期1月月考试数学试题辽宁省朝阳市建平县2023-2024学年高二上学期1月期末数学试题陕西省延安市延川县中学2023-2024学年高一上学期第一次月考数学试题