名校
解题方法
1 . 如图,四边形ABCD为矩形,DA⊥平面ABE,AE=EB=BC=2,
![](https://img.xkw.com/dksih/QBM/2017/4/10/1662840251047936/1719537662132224/STEM/a2ee68f08937452f9f06f51644123cee.png?resizew=240)
BF⊥平面ACE,且点F在CE上.
(1)求证:AE⊥BE;
(2)求三棱锥D—AEC的体积;
(3)设点M在线段AB上,且满足AM=2MB,试在线段CE上确定一点N,
使得MN∥平面DAE.
![](https://img.xkw.com/dksih/QBM/2017/4/10/1662840251047936/1719537662132224/STEM/a2ee68f08937452f9f06f51644123cee.png?resizew=240)
您最近一年使用:0次
名校
2 . 已知平行四边形
的三个顶点的坐标为
,
,
.
![](https://img.xkw.com/dksih/QBM/2017/11/19/1820411824758784/1822059358068736/STEM/2d4713bc4cb5445e81bab2ac4192f741.png?resizew=123)
(1)求平行四边形
的顶点
的坐标;
(2)在
中,求
边上的高所在直线方程;
(3)求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbb36e620314320459d127f4aa3079a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8788f09531817c29117e11f91c47214c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6062365ab5d5242b1a59060c063e7b4f.png)
![](https://img.xkw.com/dksih/QBM/2017/11/19/1820411824758784/1822059358068736/STEM/2d4713bc4cb5445e81bab2ac4192f741.png?resizew=123)
(1)求平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(3)求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2017-11-21更新
|
566次组卷
|
2卷引用:江苏省常熟市2017-2018学年上学期高二期中考试数学试题
名校
解题方法
3 . 如图,在多面体ABCDEF中,四边形ABCD是菱形,AC,BD相交于点O,EF∥AB,AB=2EF,平面BCF⊥平面ABCD,BF=CF,点G为BC的中点.求证:
(1) 直线OG∥平面EFCD;
(2) 直线AC⊥平面ODE.
您最近一年使用:0次
2017-07-15更新
|
663次组卷
|
5卷引用:江苏省如皋市搬经中学2016-2017学年高一下学期必修二综合练习数学试题
解题方法
4 . 如图,在直三棱柱
中,
,
、
、
分别是
、
、
的中点,且
.
(1)求证:
平面
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc340f79ec817a3d76cffa7d458b861.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a48f3a086c6961c5ba7e121a4e60738e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51838e395dfc9d9ef597d9e01f46272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/690f79bf2f1606d0d1614b8594a8969f.png)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572073550823424/1572073556516864/STEM/0025ea62de8b4c07a53dbb8081b040dd.png?resizew=167)
您最近一年使用:0次
2016-12-03更新
|
579次组卷
|
2卷引用:江苏省太仓市明德高级中学2017-2018学年高二上期中复习(立体几何)数学试题
名校
5 . 已知直线l过点P(3,4),且与以A(-1,0),B(2,1)为端点的线段AB有公共点,求l的斜率k的取值范围.
您最近一年使用:0次
2017-06-23更新
|
480次组卷
|
2卷引用:江苏省南京师范大学附属中学2016届高三一轮同步训练:直线的斜数学试题
6 . 如图,在四棱锥
中,底面
是矩形,点
在棱
上(异于点
,
),平面
与棱
交于点
.
![](https://img.xkw.com/dksih/QBM/2017/5/4/1679679802572800/1679883070554112/STEM/a0a47f2ba01a4175907c48175dcf2ffc.png?resizew=180)
(1)求证:
;
(2)若平面
平面
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/2017/5/4/1679679802572800/1679883070554112/STEM/a0a47f2ba01a4175907c48175dcf2ffc.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3602ec4c8f5ac2737fa78c05708c869f.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac559a1a89bfb16e1c44cdd7ad2f2bbd.png)
您最近一年使用:0次
解题方法
7 . 如图,在斜三棱柱
中,侧面
是菱形,
与
交于点O,E是棱
上一点,且
平面
.
![](https://img.xkw.com/dksih/QBM/2017/3/15/1644570517929984/1649114046242816/STEM/1698d9e74e79470bb6f2ac9988a94c94.png?resizew=212)
(1)求证:E是
的中点;
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af142a6050b54e8b5777a085d4597481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://img.xkw.com/dksih/QBM/2017/3/15/1644570517929984/1649114046242816/STEM/1698d9e74e79470bb6f2ac9988a94c94.png?resizew=212)
(1)求证:E是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1515a445310d259a080d02e16c2e58e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619174cab53737ab3547ec3970f42575.png)
您最近一年使用:0次
2017-03-22更新
|
587次组卷
|
2卷引用:2016-2017学年江苏苏锡常镇四市高三教学情况调研(一)数学试卷
8 . 已知平面直角坐标系
内两个定点
、
,满足
的点
形成的曲线记为
.
(1)求曲线
的方程;
(2)过点B的直线
与曲线
相交于C、D两点,当⊿COD的面积最大时,求直线
的方程(O为坐标原点);
(3)设曲线
分别交x、y轴的正半轴于M、N两点,点Q是曲线
位于第三象限内一段上的任意一点,连结QN交x轴于点E、连结QM交y轴于
.求证四边形MNEF的面积为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a82b85d3f59cf6c73fd6f31cb8bd097.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f911e0ed2429ab67c269cb0ff60ef218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d552ee3c32a8976ff5767daaafac770c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a66ef108cc7020ce02fadd6e673f8f8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb4db5074e7c8945c1800f1cc324be9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
(2)过点B的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(3)设曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
您最近一年使用:0次
解题方法
9 . 如图,在四棱锥
中,
为
的中点.
(1)若
,
,求证:
平面
;
(2)若
,平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
平面
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e839ac941e8bf536ff35a12e56c7a400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f369bec2d5682bf6b8b317a08aff546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03203dd5ac79dd8c6707e4340773359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfa54114f04a75b8c96165b3718ed7f.png)
![](https://img.xkw.com/dksih/QBM/2017/6/29/1719197939507200/1719584469590016/STEM/84afe2736ca74c659fd549a260b09ba9.png?resizew=184)
您最近一年使用:0次
解题方法
10 . 如图所示,互相垂直的两条道路
、
相交于
点,点
与
、
的距离分别为
千米、
千米,过点
建一条直线道路
,与
、
分别交于
、
两点.
(1)当
时,试求
的长;
(2)若使
的面积最小,试求
、
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/548e9e5752cd788a0cb5dd74372f0c8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
(2)若使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/18/27db1981-7608-4df0-a7d5-60ba004cf017.png?resizew=233)
您最近一年使用:0次