解题方法
1 . 设函数
.
(1)证明不等式:
;
(2)
,若
为函数g(x)的两个不等于1的极值点,设
,
,记直线PQ的斜率为k,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc873fc03e6e4d3c4ba02f8b1147b20.png)
(1)证明不等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a192e9e9cee6182ff394d094dd938a7e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab34ec0ce5d806047d91e173d7e40695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c306fc040b301afa03595d08d3bec211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a119cde488b5161327e1ca2ce718205f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb4f26664f84a446fa98ca69d3f6888.png)
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2022高三·全国·专题练习
名校
解题方法
2 . 如图,直三棱柱ABC-A1B1C1中,AC=BC=1,∠ACB=90°,D是A1B1的中点,F在BB1上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/043f4925-d280-41a0-ad2b-a5b3364d2fc5.png?resizew=139)
(1)求证:C1D⊥平面AA1B1B;
(2)在下列给出三个条件中选取哪两个条件可使AB1⊥平面C1DF?并证明你的结论.
①F为BB1的中点;②AB1=
;③AA1=
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/043f4925-d280-41a0-ad2b-a5b3364d2fc5.png?resizew=139)
(1)求证:C1D⊥平面AA1B1B;
(2)在下列给出三个条件中选取哪两个条件可使AB1⊥平面C1DF?并证明你的结论.
①F为BB1的中点;②AB1=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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3 . 已知函数
,
.
(1)求函数
在
处的切线方程;
(2)是否存在正数
的值使得
对任意
恒成立?证明你的结论.
(3)求证:
在
上有且仅有两个零点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99e9ad6356c61c78e0c6bdcb5cda6ad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
(2)是否存在正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5958f044ad2968f1b3d26d2b20b49b71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168163183a3d4663be45755f44676191.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5623a71215a5883b54bd85d48940a36f.png)
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2020-12-24更新
|
554次组卷
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5卷引用:山东省菏泽市(二中系列校)2020-2021学年高三上学期期末考试数学试题(B)试题
山东省菏泽市(二中系列校)2020-2021学年高三上学期期末考试数学试题(B)试题江苏省苏州市张家港市2020-2021学年高三上学期12月阶段性调研测试数学试题江苏省南通市如皋中学等三校2021-2022学年高三上学期10月学情检测卷数学试题(已下线)专题36 盘点导数与函数零点的交汇问题—备战2022年高考数学二轮复习常考点专题突破江苏省南京大学附属中学2022届高三下学期四月质量检测数学试题
名校
解题方法
4 . 已知数列
中,
,其前
项的和为
,且当
时,满足
.
(1)求证:数列
是等差数列;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.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/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c154da7ed535cfd1edf19bc6d907ae.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8050391385b496e9c059201e4f12600a.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd74d291484f4da59ac2149d2ec135c.png)
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2019-12-01更新
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7卷引用:山东省菏泽第一中学老校区2019-2020学年高三12月月考数学试题
5 . 在用反证法证明“已知
,求证:
”时的反设为__________ ,得出的矛盾为________ .
![](https://img.xkw.com/dksih/QBM/2017/5/1/1677586164473856/1678579004612608/STEM/31618af1084147ddaa6deb82df8ecd89.png?resizew=75)
![](https://img.xkw.com/dksih/QBM/2017/5/1/1677586164473856/1678579004612608/STEM/c35f0a87746d490d8077de28f3f2544f.png?resizew=61)
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2017-05-02更新
|
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2卷引用:山东省菏泽市2016-2017学年高二下学期期中考试数学(文)试题
2024高一下·全国·专题练习
名校
解题方法
6 . 如图,在三棱台
中,
,
分别为
的中点.求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8783bc74553bf44b61d999a0e4144bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd2e870c95b1ed54b281f93e683578bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0f067a2a348ceb24a408f82992eab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675a92cad72c65aa4071b9d9e226090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/debdc6632a4877e5131d3da25cda8b89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1828e73ec5e00f95aa11ff74c703a5c1.png)
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2024-04-23更新
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9卷引用:山东省菏泽市鄄城县第一中学2023-2024学年高一下学期5月月考数学试题
山东省菏泽市鄄城县第一中学2023-2024学年高一下学期5月月考数学试题(已下线)8.5.2 直线与平面平行【第二练】“上好三节课,做好三套题“高中数学素养晋级之路(已下线)6.4.1直线与平面平行-【帮课堂】(北师大版2019必修第二册)(已下线)第8.5.2讲 直线与平面平行-同步精讲精练宝典(人教A版2019必修第二册)(已下线)专题13.4空间直线与平面的位置关系--重难点突破及混淆易错规避(苏教版2019必修第二册)(已下线)11.3.1&11.3.2 平行直线与异面直线、直线与平面平行-【帮课堂】(人教B版2019必修第四册)(已下线)专题06 立体几何初步解答题热点题型-《期末真题分类汇编》(江苏专用)(已下线)专题04 第八章 立体几何初步(1)-期末考点大串讲(人教A版2019必修第二册)(已下线)专题05 立体几何初步(2)-期末考点大串讲(苏教版(2019))
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7 . 已知三棱柱
中,底面
是边长为2的正三角形,
为
的重心,
.
;
(2)已知
,
平面
,且
平面
.
①求证:
;
②求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e827641feb4179bca7033ed8760bf728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26208e5d58cc5abf1af936480d1932b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c67e20ce068f373fe1cc3b4811b58b.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/962ddfa6a45e5588279c2a93f142924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae737bd4c7f31bdc93155459a48d8457.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d862fc2fe541999e0c175d32e90a81ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d95f4efa734e4ac9f4ff5f4569f7cf.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0ff310aabd2282b539537ebed3f788.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
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2024-04-13更新
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2卷引用:山东省菏泽第一中学三校区联考2024届高三下学期5月月考数学试题
8 . 已知数列
的前n项和为
,
且
,令
.
(1)求证:
为等比数列;
(2)求使
取得最大值时的n的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f4e1236d7dc0366d9523d0cbb426be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ccf4e9b36c61b9f57f07d8f41164e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17be2d7ecea4830c909b88602a84872f.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
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2024-04-07更新
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2093次组卷
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2卷引用:山东省菏泽市单县第一中学2024届高三下学期3月月考数学试题
9 . 已知在平面直角坐标系
中,一直线与从原点
出发的两条象限角平分线(一、四象限或二、三象限的角平分线)分别交于
,
两点,且满足
,线段
的中点为
,记点
的轨迹为
.
(1)求轨迹
的方程;
(2)点
,
,
,过点
的一条直线
与
交于
、
两点,直线
,
分别交直线
于点
,
,且满足
,
,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a9e1eb4c3226489d1344321b10b7de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/99e2b7fbdd8d0518416851893f47fece.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(1)求轨迹
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e9b5e076078240e0c5ad9763a9824d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/355dffb42861f3e297694f4be77c694c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65d0d57d96fa8a66c58c04c8dfb512fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d7b816eca15d4b7d060013df53edd53.png)
![](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/b4d75c711d34d016403fa88dccbb51f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/732dbd8750949827dd4f537eec09ebbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587b693b82241eb9c32cdbb96c209f33.png)
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解题方法
10 . 已知数列
的首项为
,前
项和为
,且
.
(1)求证:数列
为等差数列.
(2)若数列
公差为
,当
取最小值时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.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/b99d9a28ab4e0121eeb381cda7838877.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89946672ca21fdb89963810a88b6cd79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e210e2af059651ec783ab5d33a4fe34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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