1 . 如图,在
中,
为
边上一点,
与
分别为
和
的平分线.
![](https://img.xkw.com/dksih/QBM/2022/8/24/3051581032407040/3054416256311296/STEM/432c6f09ddd742e0800436bc37acdea7.png?resizew=265)
(1)判断
是什么三角形,并证明你的结论;
(2)比较
与
的大小;
(3)以
为直径的
交
于点
,连接
与
交于
,若
,
,求证:
,并求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c42b59b76eafbbe36f13b2daa60132c.png)
![](https://img.xkw.com/dksih/QBM/2022/8/24/3051581032407040/3054416256311296/STEM/432c6f09ddd742e0800436bc37acdea7.png?resizew=265)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2cc5f8cec8c498aa12c99c04e1c97d.png)
(2)比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(3)以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29224be6a2381b38bc64b144d26dad26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f364bf9d8b0bfc299e51097b3ca512f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12b092922acd073edfc3a3887822af40.png)
您最近一年使用:0次
2 . 已知
是
的内接三角形,
为
的切线,
为切点,
为直线
上一点,过点
作
的平行线交直线
于点
,交直线
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/29/9977fd52-78ee-4971-ac47-aec1699b50ee.png?resizew=300)
(1)当点
在线段
上时,求证:
;
(2)当点
为线段
延长线上一点时,第(1)题的结论还成立吗?如果成立,请证明,否则说明理由;
(3)若
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7bf58e5fea1189b33cf55d86335452f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7bf58e5fea1189b33cf55d86335452f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/29/9977fd52-78ee-4971-ac47-aec1699b50ee.png?resizew=300)
(1)当点
![](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/10ec004a08fa1e44677983a09cac00d1.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59ce4fb445ca4eeaf5e0b1f4b76593db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
您最近一年使用:0次
名校
3 . 已知函数
是定义在区间
上的奇函数,且
.
(1)用定义法证明函数
在区间
上单调递增;
(2)设
,求证:
是偶函数,
是奇函数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/538f102c463e6b0860ba0453171bc322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e91676c7adfd65a76f56a0c1d4bbe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66fc2ac8242124d9b8aa003bc28e80f9.png)
(1)用定义法证明函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e91676c7adfd65a76f56a0c1d4bbe0.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1c7658348f507f9092db01b60e55d17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc31e288402f140935a0979a78e09954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b5cd9c2e906d672176fd7d3564e97d9.png)
您最近一年使用:0次
名校
4 . 如图,正方形
的边长为2,
的中点分别为
,正方形
沿着
折起形成三棱柱
,三棱柱
中,
,
.
![](https://img.xkw.com/dksih/QBM/2021/11/10/2848062464098304/2848946913853440/STEM/bcafdf96eae8407383882f1bf499bb99.png?resizew=458)
(1)证明:当
时,求证:
平面
;
(2)若二面角
的余弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da62d9c339d604c5ffafc82fc54e2b17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8239d94c830497c40359d1312ec4b282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](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/564517b02a6a50ff1ef6251d634530f8.png)
![](https://img.xkw.com/dksih/QBM/2021/11/10/2848062464098304/2848946913853440/STEM/bcafdf96eae8407383882f1bf499bb99.png?resizew=458)
(1)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3cf0f585938ede9eca890a6eb326d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6d06903252260d31d1a9cdeb735b089.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78ceb31247add8ca7b0853e801e1d125.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac5b7d85cc224776e36a76a4db5d356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2021-11-11更新
|
435次组卷
|
2卷引用:湖南省长沙市雅礼教育集团2021-2022学年高二上学期期中联考数学试题
5 . 已知数列
满足
,
.
(1)求证数列
是等差数列,并求数列
的通项公式;
(2)令
,数列
的前
项和为
,证明:对于任意的
,都有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/133504f0106779c3ab1f1e2674d47092.png)
(1)求证数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf3da897eb73b729f66bb0d700775c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daaa7aa6e396c16589c42da0a52f79c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d340c4f90493d5c502e30f5a8326ca.png)
您最近一年使用:0次
6 . 曲线的曲率定义如下:若
是
的导函数,令
,则曲线
在点
处的曲率
.已知函数
,
,且
在点
处的曲率
.
(1)求
的值,并证明:当
时,
;
(2)若
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d0268c3aeac7836cf0d453efc67f3ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe7522a3f232bd0b7a7850ae674db43f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ae838c10d4fc8c474d7873dc8cfd07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b72cd624f7e5bfe6549f3e62f0432a17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d4aa0ab41b5773fd67600fe2de77d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c6b6a11760d0724b0b60e55970e229.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b301df975f8b3b3ba0cab5c4f8f12028.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05fce924911d5ed93147dfce9e41c2b0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a9e96e2ed7d9cd25c06f9a51a7210a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de6e9b440a15088e5f450cd4438ae72f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c3fdcd52eebd86207b01a571c845f6.png)
您最近一年使用:0次
2021-05-02更新
|
791次组卷
|
4卷引用:湖南省永州市2021届高三下学期三模数学试题
湖南省永州市2021届高三下学期三模数学试题(已下线)专题3.13 不等式的证明问题-2021年高考数学解答题挑战满分专项训练(新高考地区专用)(已下线)第五篇 向量与几何 专题21 曲率与曲率圆 微点1 曲率与曲率圆(一)山西省晋城市第一中学校2024届高三上学期11月期中数学试题
名校
解题方法
7 . 已知数列
满足
,且
.
(1)证明:
为等差数列;
(2)令
,设数列
的前n项和为
,求证:对任意
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b61704c6dadbda381e6fa2997bde1c8c.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641c32767c1cbfdd7f4dd9effd972a9e.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc26a7e45a61a98ae584b10ce7bd2006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f451f294eca616d6143c0a270d620bb1.png)
您最近一年使用:0次
8 . 已知各项均为正数的数列
满足
,且
,
.
(1)证明:数列
是等差数列;
(2)数列
的前项
和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7982a20f15d27117b40f6dc6283bdbea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c133f850a40f4d23c30fa91a1e7d74a2.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bd36c2e9b9b3cd4bc9e65f903a2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94351ce858fa3f3a09cfadc2d23d7253.png)
您最近一年使用:0次
2021-02-21更新
|
126次组卷
|
2卷引用:湖南省益阳市桃江县第一中学2020-2021学年高二(研学班)下学期入学考试数学试题
名校
解题方法
9 . 已知函数
对任意
,总有
,且当
时,
,
,
(Ⅰ)求证:函数
是奇函数;
(Ⅱ)利用函数的单调性定义证明,
在
上的单调递减;
(Ⅲ)若不等式
对于任意的
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcbca3478eae63853d2aab5332e2e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/941b4ceaf8c97a676d9ad3320cb940d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b666663ce3537a634a3b427b418eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf72bb8497a21b03e0ebfc1faec3079d.png)
(Ⅰ)求证:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(Ⅱ)利用函数的单调性定义证明,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
(Ⅲ)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13a6fbeec8019554bfe254504ed41ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00231660ef092b9383a4d4196c8ef850.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2020-11-26更新
|
730次组卷
|
7卷引用:湖南省长沙市望城区金海学校2021-2022学年高一上学期期中数学试题
湖南省长沙市望城区金海学校2021-2022学年高一上学期期中数学试题(已下线)练习11+抽象函数性质专题专题-2020-2021学年【补习教材·寒假作业】高一数学(北师大版)(已下线)3.2.2 奇偶性(精讲)-2021-2022学年高一数学一隅三反系列(人教A版2019必修第一册)北京景山学校远洋分校2020—2021学年高一上学期数学学科期中测试试题河南省鹤壁市浚县第一中学2022-2023学年高一上学期10月月考数学试题河南省驻马店市上蔡县衡水实验中学2022-2023学年高一上学期期中数学试题福建省厦门市湖滨中学2023-2024学年高一上学期期中数学试题
10 . 如图所示,在四棱锥
中,四边形
是正方形,点
分别是线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/684f0061-f471-44fa-b0ef-91fd3df2774a.png?resizew=140)
(1)求证:
;
(2)线段
上是否存在一点
,使得面
面
,若存在,请找出点
并证明;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1e038b4e76b3a368731d3331522b8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d70676406f26d339465fe3473c0c05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a003de8409231a347edebc8284be186c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85de410d85be189dfa5aabb33410b896.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/684f0061-f471-44fa-b0ef-91fd3df2774a.png?resizew=140)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da4cd5cd0de37a81455262f96acaca01.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f32299ca54d8b38967931d69a218c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
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2019-01-26更新
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