1 . 在极坐标系中,曲线
:
,曲线
:
,曲线
相交于
两点.
(1)求曲线
、
的直角坐标方程;
(2)求弦
长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd7eb2643fcd0e79eaefe2680cd05df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e02ea9b3348231f0ab865d7ed871140.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e9feabc99f62ee569b460e61526e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)求弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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2 . 如图,四棱锥A﹣BCDE中,AB、BC、BE两两垂直且AB=BC=BE,DE∥BC,DE=2BC,F是AE的中点.
![](https://img.xkw.com/dksih/QBM/2020/5/29/2473110985932800/2473791765028864/STEM/037af5bbea0a434d89c52fafa476a79a.png?resizew=207)
(1)求证:BF∥面ACD;
(2)求证:面ADE⊥面ACD.
![](https://img.xkw.com/dksih/QBM/2020/5/29/2473110985932800/2473791765028864/STEM/037af5bbea0a434d89c52fafa476a79a.png?resizew=207)
(1)求证:BF∥面ACD;
(2)求证:面ADE⊥面ACD.
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解题方法
3 . 如图,在直三棱柱
中,
,
是棱
上的一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/87d5736f-8245-4fb7-8ea5-7e2bb72c9786.png?resizew=274)
(1)求证:
;
(2)若
,
分别是
,
的中点,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/87d5736f-8245-4fb7-8ea5-7e2bb72c9786.png?resizew=274)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/736eca86008d535f03500d32ac00cd46.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d447ce2833cac5260ed5532283fa3997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3284befd44bf296dcfd1deaf99de45.png)
您最近一年使用:0次
解题方法
4 . 在直三棱柱
中,
,
,点
,
,
分别是棱
,
,
的中点.
平面
;
(2)求证:直线
平面
.
![](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/9e78a23ef615a0815e2cf7b226c418dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5164c4e5ff72edf4d6502b5349779e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1de7da3ab92e70f135ea628a691167.png)
(2)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e89195bacd53d43195e70c12b5cfa041.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1de7da3ab92e70f135ea628a691167.png)
您最近一年使用:0次
2020-05-29更新
|
607次组卷
|
4卷引用:江苏省苏州市吴江区汾湖中学2019-2020学年高三下学期期初数学试题
解题方法
5 . 在平面直角坐标系xOy中,已知圆C经过点(
,
),(
,
),且与直线
相切.
(1)求圆C的方程;
(2)设P是直线l:x=4上的任意一点,过点P作圆C的切线,切点为M,N.
①求证:直线MN过定点(记为Q);
②设直线PQ与圆C交于点A,B,与y轴交于点D.若
,
,求+µ的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9db9373e74ecf5d63ad98afe66aa4ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9db9373e74ecf5d63ad98afe66aa4ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8bab7b913a04839bb9d4f1d5c8ce64c.png)
(1)求圆C的方程;
(2)设P是直线l:x=4上的任意一点,过点P作圆C的切线,切点为M,N.
①求证:直线MN过定点(记为Q);
②设直线PQ与圆C交于点A,B,与y轴交于点D.若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3203dbadc8410c9b5e376d53ee423b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a21869d6ab00db4f935b9087530e89e.png)
您最近一年使用:0次
解题方法
6 . 如图,
平面ABC,
,EA=2DC,F是EB的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/3e05df3c-ed37-4aed-a27e-f60e0072fc04.png?resizew=120)
(1)求证:
平面ABC;
(2)求证:
平面ABC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed04b01505bbd8a4ac0bc12e46f23bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce61f477dbe1f786c4255bafbc3c4f65.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/3e05df3c-ed37-4aed-a27e-f60e0072fc04.png?resizew=120)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689c065652544780be8b33ae92cbb6d7.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd51f5468037b15b1dd60645c07599d1.png)
您最近一年使用:0次
解题方法
7 . 已知在四棱柱ABCD—A1B1C1D1中,底面ABCD是菱形,且平面A1ADD1⊥平面ABCD,DA1=DD1,点E,F分别为线段A1D1,BC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/dee97a28-a2a4-4ca6-b07a-1844f9d4ee89.png?resizew=219)
(1)求证:EF∥平面CC1D1D;
(2)求证:AC⊥平面EBD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/dee97a28-a2a4-4ca6-b07a-1844f9d4ee89.png?resizew=219)
(1)求证:EF∥平面CC1D1D;
(2)求证:AC⊥平面EBD.
您最近一年使用:0次
名校
解题方法
8 . 如图,矩形
所在平面与菱形
所在平面互相垂直,交线为
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/245a01a2-f344-4ebf-a241-1d7a4915b3f4.png?resizew=174)
(1)求证:
平面
;
(2)若点
在线段
上,且
,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad2de15162b13ba943f8da2498580cf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23f01af749100e1888bba06268843db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/245a01a2-f344-4ebf-a241-1d7a4915b3f4.png?resizew=174)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932a04304f2d4975955d4baabb2deeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6096e490592b9cbf1969565caef36a14.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/801efc9f3db877901bdaaa157d45cc63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72344839908b65ee51295f7252f44cbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/128c69eb81dae89c6989d06d20925ad2.png)
您最近一年使用:0次
2020-05-25更新
|
509次组卷
|
2卷引用:2020届江苏省淮安市高三下学期5月调研测试数学试题
2020高三·江苏·专题练习
名校
解题方法
9 . 如图,在直四棱柱
中,四边形
为矩形,
是
的中点,
是
上以点,且满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/3da309b6-dda3-419a-bae1-fb7f34d2b4b9.png?resizew=206)
(1)求证:
;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554b3b4c5ce7aca81becc07ed4903736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd45c4221fa355f9f497d7fe1dbf5a2c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/3da309b6-dda3-419a-bae1-fb7f34d2b4b9.png?resizew=206)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354e321ac9ab002db04261253b19ba9d.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f11af46fe44e3c454751ff57a8b10b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
您最近一年使用:0次
10 . 有一块以点
为圆心,半径为
百米的圆形草坪,草坪内距离
点
百米的
点有一用于灌溉的水笼头,现准备过点
修一条笔直小路交草坪圆周于
两点,为了方便居民散步,同时修建小路
,其中小路的宽度忽略不计.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/977f716b-9d69-40d0-8da1-b87d4cc4aac1.png?resizew=141)
(1)若要使修建的小路的费用最省,试求小路的最短长度;
(2)若要在
区域内(含边界)规划出一块圆形的场地用于老年人跳广场舞,试求这块圆形广场的最大面积.(结果保留根号和
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5a5e484dfef494d27bc35ae7b8cf75d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/977f716b-9d69-40d0-8da1-b87d4cc4aac1.png?resizew=141)
(1)若要使修建的小路的费用最省,试求小路的最短长度;
(2)若要在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
您最近一年使用:0次