1 . 如图,在几何体
中,底面
为矩形,
,
,
,
,
为棱
上一点,平面
与棱
交于点
.
![](https://img.xkw.com/dksih/QBM/2017/5/11/1684912865673216/1685479864049664/STEM/aa12d1e9-0bb5-4e0d-bde5-723d2de98aed.png?resizew=255)
(Ⅰ)求证:
;
(Ⅱ)求证:
;
(Ⅲ)若
,试问平面
是否可能与平面
垂直?若能,求出
值;若不能,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451557ef624a9c142ebc5fa155e0e28b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b7f93bcf621d7a3abd80bb3e3d64a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99461e5fc6016bdabcc43b8224f10072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9ae3d0f7137d2bf4e811d3640734a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddb7c2ca1b6bee86cb24fed02e40da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/2017/5/11/1684912865673216/1685479864049664/STEM/aa12d1e9-0bb5-4e0d-bde5-723d2de98aed.png?resizew=255)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3df3f49493b1f7317cbe2e95e79338a3.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eaea18240f5c0a843c629714d459dfb.png)
(Ⅲ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c388d0a3f0a8d9fb0b9576d00af225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a406f24b5131eb7da9127750319e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb24880b91198d8fc0ef639020c897a.png)
您最近一年使用:0次
2017-05-12更新
|
755次组卷
|
3卷引用:北京市西城区2017届高三二模数学文科试题
解题方法
2 . 已知圆
过点
,圆心在直线
上且圆心在第一象限,圆
被
轴截得的弦长为
.
(1)求圆的方程.
(2)过点
作圆
的切线,求切线的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b931faee548175c7895ac9eeca6fed83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b91d650c2fc1a741fabdb333b09aeb6.png)
(1)求圆的方程.
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560ab719df4b08d983743834d6d2bbc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
名校
解题方法
3 . 已知平面上有三个定点
,
,
.
(1)已知
、
分别为
、
中点,求
所在直线方程.
(2)求
的边
的高所在直线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d16b5778fb2d489216cb233adbb2463b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2442a318b33a4ee99ca57009c9a2ad1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b776e8a8d2501624296dbcdf46136c6b.png)
(1)已知
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2017-11-03更新
|
346次组卷
|
2卷引用:北京市西城外国语2016-2017学年高二上学期期中考试数学(文)试题
名校
4 . 已知圆
内有一点合
,过点
作直线
交圆
于
,
两点
(Ⅰ)当弦
被点
平分时,写出直线
的方程.
(Ⅱ)当直线
的斜率为
时,求弦
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451685559d39b6bdd62480e90fba48ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7bd4e5049fa304e4d352bfe6dee455d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(Ⅰ)当弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(Ⅱ)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
5 . 在直棱柱
中,已知
,设
中点为
,
中点为
.
![](https://img.xkw.com/dksih/QBM/2018/6/25/1974931400867840/1977723187625984/STEM/7d1e1a84aa15412ab60570549c06d4dd.png?resizew=154)
(Ⅰ)求证:
平面
.
(Ⅱ)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2018/6/25/1974931400867840/1977723187625984/STEM/7d1e1a84aa15412ab60570549c06d4dd.png?resizew=154)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7caa95b00cb6c2d12b1b9eb666cc848d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(Ⅱ)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a2e10a5aebe40a9018d5ee3ade7af8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
您最近一年使用:0次
名校
6 . 在平面直角坐标系中,已知矩形
的长为
,宽为
,
、
边分别在
轴、
轴的正半轴上,
点与坐标原点重合.将矩形折叠,是
点落在线段
上.
(Ⅰ)当
点落在
中点时,求折痕所在的直线方程.
(Ⅱ)若折痕所在直线的斜率为
,求折痕所在的直线方程与
轴的交点坐标.(答案中可以出现
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
(Ⅱ)若折痕所在直线的斜率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://img.xkw.com/dksih/QBM/2017/11/11/1814911767027712/1815859262357504/STEM/45c804622207432695f64995db1bbb22.png?resizew=258)
您最近一年使用:0次
2017-11-12更新
|
345次组卷
|
3卷引用:北京市十一学校2016-2017学年高二上学期期中考试数学(文)试题
7 . 点
为两直线
和
的交点.
(1)求
点坐标.
(2)求过
点且与直线
平行的直线方程.
(3)求过原点且与直线
和
围成的三角形为直角三角形的直线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5a01affde526de97fc08e56acdf93e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07a0d5cc024f4f8c628ff50a6a190a83.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)求过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/198423f0798da7ce226576b97a1f289e.png)
(3)求过原点且与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
您最近一年使用:0次
8 . 四棱锥
中,侧面
是边长为
的正三角形,且与底面垂直,底面
是面积为
的菱形,
为锐角,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2018/6/25/1974931368706048/1980563147513856/STEM/3f34b59bdf71493f923b1429e2152f8e.png?resizew=239)
(Ⅰ)求证:
面
.
(Ⅱ)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
.
(Ⅲ)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/2018/6/25/1974931368706048/1980563147513856/STEM/3f34b59bdf71493f923b1429e2152f8e.png?resizew=239)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e185fb88ee102e95191154f6cb378aeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68a7bf0da4f7c6f739d2e2461ad9b7.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(Ⅲ)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
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名校
解题方法
9 . 在四棱锥
中,底面
为菱形,侧面
为等边三角形,且侧面
底面
,
,
分别为
,
的中点.
(1)求证:
.
(2)求证:平面
平面
.
(3)侧棱
上是否存在点
,使得
平面
?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5f0cfc1049f84a04c81bd213afb8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c603778990c5726c4bdef5038b759f7c.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa8eada32f6d159b8b57f03af40ddca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(3)侧棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f475878dd1b32b0486cbf7b5ffbedd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a48b437f403a1879357cece32efada.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/505abdb4631fe10cdcdde3dc3d6aad32.png)
![](https://img.xkw.com/dksih/QBM/2017/11/11/1814911767027712/1815859262668800/STEM/cfebecfc78dc41269a8c9198a0ff330e.png?resizew=185)
您最近一年使用:0次
2016-12-04更新
|
1547次组卷
|
2卷引用:北京市十一学校2016-2017学年高二上学期期中考试数学(文)试题
解题方法
10 . 矩形
中,
,
边所在直线的方程为
,点
在
边所在直线上.
![](https://img.xkw.com/dksih/QBM/2017/12/20/1842722035777536/1846046821064704/STEM/0c479503f04c417ca16799f25ab68a50.png?resizew=138)
(1)求
边所在直线的方程.
(2)求矩形
外接圆的方程.
(3)若过点
作题(
)中的圆的切线,求切线的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6810da77bafee796a54b2e31f7d729e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751bf4d00190b30344d20214aa72eac6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4eb70f66adffed6798a625da0f8dac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2017/12/20/1842722035777536/1846046821064704/STEM/0c479503f04c417ca16799f25ab68a50.png?resizew=138)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)求矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
您最近一年使用:0次