名校
解题方法
1 . 如图,在棱长为1的正方体
中,
,
,
,
分别是棱
,
,
,
的中点.
的体积;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0926147074b3aa7efb70a318bcb494c8.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d46f725fb1c57d0855a0a6cc26bf562a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfc50ecfa45216f8d098662452cf8d08.png)
您最近一年使用:0次
2020-09-04更新
|
784次组卷
|
2卷引用:湖北省仙桃市、天门市、潜江市2019-2020学年高一下学期期末数学试题
解题方法
2 . 如图,在四棱锥
中,平面
平面
,
,
,
,点
为
上一点且
=
=
=
.
(1)求证:平面
平面
;
(2)若直线
与平面
所成的角的正弦值为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ce152ae4cea885a04e753b0d7378b0.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3d9d62804daa6e74daaf8373d3f2e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97392ff60fac8a261c6eab71bba028b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e7c1dff6ff6812b8ad2102b4b51777.png)
![](https://img.xkw.com/dksih/QBM/2020/7/11/2503162710474752/2503881127501824/STEM/bcf8deabc2a845619eb251260128f2a0.png?resizew=165)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a940f43e94a687339a9b50e0694e2e8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65bf87f74420270138ed73a2d38ca48.png)
您最近一年使用:0次
3 . 若椭圆
与椭圆
满足
,则称这两个椭圆相似,m叫相似比,已知圆
的离心率为
,椭圆M与椭圆C相似,且经过点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/b305ca40-8c1d-481f-b319-5c3167c87c15.jpg?resizew=191)
(Ⅰ)求椭圆M的标准方程;
(Ⅱ)椭圆M的左右顶点分别为A、B,过A,B两点分别作斜率为
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d227e3424f52b5050bf01977ff12784.png)
的直线,分别交椭圆于D、E两点,
,P为垂足,证明:存在定点Q,使得
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441fb4299c9f4f1f7c683958f4882d7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c074753132281fca5df48cb3ca29385a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6484bb04ee995fa21bdde034b146707d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2de52259b426acb42761fec59a7748.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/b305ca40-8c1d-481f-b319-5c3167c87c15.jpg?resizew=191)
(Ⅰ)求椭圆M的标准方程;
(Ⅱ)椭圆M的左右顶点分别为A、B,过A,B两点分别作斜率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d227e3424f52b5050bf01977ff12784.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3cb77304ba3546c1fc629832f1b811f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e32cf73c01995c91c3523fa11b3bd7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44e8bc37ed03f44470762748a8f942a.png)
您最近一年使用:0次
2021-01-02更新
|
115次组卷
|
4卷引用:湖北省智学联盟2020-2021学年高二上学期12月联考数学试题
湖北省智学联盟2020-2021学年高二上学期12月联考数学试题湖北省咸宁市通城二中2020-2021学年高二上学期期末数学试题(已下线)期末测试卷01(基础卷)-【满分计划】2022-2023学年高二数学阶段性复习测试卷(苏教版2019选择性必修第一册)(已下线)期末测试卷01(培优卷)-【满分计划】2022-2023学年高二数学阶段性复习测试卷(苏教版2019选择性必修第一册)
4 . 如图,在底面为平行四边形的四棱锥
中,
,
,
,
,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/4f677c78-ff96-44b6-8e49-5236cf12a905.png?resizew=163)
(1)证明:
平面
.
(2)求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b1472e121da0ae5550329cfda5f0a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc6273429616c8e3b2b185262f5e476e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1e747f1f5afecdbc8d85065840e6a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba0db442bddfa899bc89e15459e58e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/4f677c78-ff96-44b6-8e49-5236cf12a905.png?resizew=163)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeebdf3d00c146a1b4d220909d7573c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed01d1ff5a7f21a68fb3a1e5c7f393e.png)
您最近一年使用:0次
2020-12-30更新
|
374次组卷
|
4卷引用:湖北省十堰市2020-2021学年高二上学期期末数学试题
解题方法
5 . 如图,
、
是以
为直径的圆上两点,
,
,
是
上一点,且
,将圆沿直径
折起,使点
在平面
的射影
在
上,已知
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/53bb030d-135e-4660-a269-1ed1e060e3d0.png?resizew=274)
(1)求证:
⊥平面
;
(2)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
平面
;
(3)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/ee6700eacd559c8820a5a5631aee02d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.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/7e77686cf448ff6cea9bfc021581da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3acee288e75061ac72203b09fce29904.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/53bb030d-135e-4660-a269-1ed1e060e3d0.png?resizew=274)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6261790c66cc71ee3898afabad0c09f4.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/217286e225eee4d5b7a7041c027393a1.png)
您最近一年使用:0次
2020-03-16更新
|
338次组卷
|
3卷引用:湖北省恩施州清江外国语学校2019-2020学年高二上学期期末数学试题
湖北省恩施州清江外国语学校2019-2020学年高二上学期期末数学试题(已下线)卷10-备战2020年新高考数学自学检测黄金10卷-《2020年新高考政策解读与配套资源》河南省焦作市2014-2015学年上学期高一学业水平测试数学试卷
6 . 在正四棱柱
中,底面边长为
,侧棱长为
.
(1)求证:平面
平面
;
(2)求直线
与平面
所成的角的正弦值;
(3)设
为截面
内-点(不包括边界),求
到面
,面
,面
的距离平方和的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f23a20779cbf15d4300ffc69f27f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9862c3f79df375b515dc9f707c763444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/129d17c9a49272d44a0e70346414d12d.png)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a73c41cc00040324243682c91a4c456.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cb5a19ba9241de9abf583b0d7aa6c4e.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd7f100848814c3e187f2d5ad7980ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b54387f870ae37f7951b253665d64f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2019·河北·高考模拟
名校
解题方法
7 . 已知抛物线E:x2=2py(p>0)的焦点为F,A(2,y0)是E上一点,且|AF|=2.
(1)求E的方程;
(2)设点B是E上异于点A的一点,直线AB与直线y=x-3交于点P,过点P作x轴的垂线交E于点M,证明:直线BM过定点.
(1)求E的方程;
(2)设点B是E上异于点A的一点,直线AB与直线y=x-3交于点P,过点P作x轴的垂线交E于点M,证明:直线BM过定点.
您最近一年使用:0次
2020-12-06更新
|
1254次组卷
|
15卷引用:湖北省襄阳市第三中学2022-2023学年高二上学期期末数学试题
湖北省襄阳市第三中学2022-2023学年高二上学期期末数学试题(已下线)【全国百强校】河北省衡水中学2019届高三第一次摸底考试数学(理)试题(已下线)2018年12月9日 《每日一题》文数人教选修1-1-每周一测(已下线)2018年12月9日 《每日一题》理科数学人教选修2-1-每周一测(已下线)2019年1月10日 《每日一题》理数(高二上期末复习)人教必修5+选修2-1-圆锥曲线中的定点、定值、探索性问题(已下线)2019年12月8日《每日一题》选修1-1文数-每周一测(已下线)专题9.7 抛物线-2021年高考数学(理)一轮复习-题型全归纳与高效训练突破(已下线)考点39 直线与圆锥曲线的位置关系-备战2021年高考数学(文)一轮复习考点一遍过(已下线)考点53 圆锥曲线的综合问题-定点、定值和探索性问题(考点专练)-备战2021年新高考数学一轮复习考点微专题北京市师大附中2022-2023学年高二上学期数学期末试题(已下线)2019年12月8日《每日一题》选修2-1理数-每周一测(已下线)专题12 解析几何中的定值、定点和定线问题 第一篇 热点、难点突破篇(练)-2021年高考数学二轮复习讲练测(浙江专用)四川成都双流县双流中学2020~2021学年下学期高二开学考试文科数学试卷河北省邯郸市大名县第一中学2022-2023学年高二下学期3月月考数学试题河南省温县第一高级中学2022-2023学年高二下学期第一次月考数学试题
解题方法
8 . 已知定义域在
上的函数
满足对于任意的
,都有
,当且仅当
时,
成立.
(1)设
,求证
;
(2)设
,若
,试比较x1与x2的大小;
(3)若
,解关于x的不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db51af23fe06951a95cc040644f6b253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25bea6d14c16f7c06e4e028f36131360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71baf6217604517fd98fa97d0f55b43.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db51af23fe06951a95cc040644f6b253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394688d094c2015a387b81c98074d935.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5973b37d49a18394b019a2608144c247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e2f24b4fa5308650a244d954f78f09b.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96e75de44dc8abc44bcd046cd5bc7f3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d10f689d027ad1851074ebc7641b416e.png)
您最近一年使用:0次
2020-06-29更新
|
873次组卷
|
4卷引用:湖北省武汉市五校联合体2019-2020学年高一上学期期末数学试题
湖北省武汉市五校联合体2019-2020学年高一上学期期末数学试题湖北省华中科技大学附属中学联考体2019-2020学年高一上学期期末数学试题(已下线)第二章+函数(能力提升)-2020-2021学年高一数学单元测试定心卷(北师大2019版必修第一册)(已下线)第三单元 (综合培优)函数的概念与性质 B卷 -【双基双测】2021-2022学年高一数学同步单元AB卷(人教A版2019必修第一册)
名校
解题方法
9 . 如图,三棱柱
的侧面
是边长为2的菱形,
,且
.
![](https://img.xkw.com/dksih/QBM/2020/3/2/2410901713600512/2410952850251776/STEM/f1e1a89db9694b669975f5f770afde43.png?resizew=315)
(1)求证:
;
(2)若
,当二面角
为直二面角时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/900e00a3609e6043af1034761d4d65f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7870cee007535b979d35bc7feab75616.png)
![](https://img.xkw.com/dksih/QBM/2020/3/2/2410901713600512/2410952850251776/STEM/f1e1a89db9694b669975f5f770afde43.png?resizew=315)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e8af8caf4f395dc9a59903a7dba85a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d31a4ddb10768e9e7868d0c34c425f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6997af36a239195f7b55557242cb03c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab8cba157598642cb6b42734861a184.png)
您最近一年使用:0次
2020-03-02更新
|
838次组卷
|
2卷引用:湖北省部分重点中学(武汉1中,3中,6中,11中等六校)2018-2019学年高一下学期期末联考数学试题
解题方法
10 . 已知等差数列
的公差为2,且
,
,
成等比数列.
(1)求数列
的通项公式;
(2)设
,数列
的前n项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77311d40ef50a900cb46680f917f0d7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d93c1ae7b22099a5d4c1c4241e5ca18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3547886abee1a603e275c6e808fb5b79.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216876de04325fd250c38c485cbc34b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1cb91e89800a81f4d62ed75c3ace24a.png)
您最近一年使用:0次