解题方法
1 . 若函数
恰有两个不同极值点
.
(1)求
的取值范围;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7fb60d4c972b57e4d455f5be30c830.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3661dbd3b2c578c685e6a11a4102ddd.png)
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解题方法
2 . 数列
满足
且
.
(1)证明:
;
(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/56d7dcf478da9ade18ef22fb21555e01.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e88df297a5b7b11083b3e87828c9b97d.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86abd8ce35e5088b91065d206eeb3cf.png)
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3 . 已知函数
,实数
,证明:
(Ⅰ)
;
(Ⅱ)当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/290e8c5ea4b5ec781c3978a35740a9f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e436ea3ddcd13e69171135f0ff8e934a.png)
(Ⅰ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6af66eb8f4efa01430dde6dcec93b57.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c74a69afbc23c5968ea546aa125b6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/713b35a2e8b270f57ef32a4c38983f84.png)
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解题方法
4 . 已知正项数列
满足:
.
(Ⅰ)求
的值,并证明:
;
(Ⅱ)设
,证明:
;
(Ⅲ)设数列
的前
项和为
,证明:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fce9621291e7d3261185766fb187a2c0.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1254070260067f8bf2fec39a7d0c8f1.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c20644542afc92f39894a2b6f44830c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a73506b20bce6228cef9ce9456782d8e.png)
(Ⅲ)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b250e4276bf3f328b03a66765541f6.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/043ceeaf2eedcb41e28eafff2514a573.png)
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5 . 设数列
的前
项的积为
,满足
,
,记![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf48cd99db12af9a0652d37ffbbd348.png)
(1)证明:数列
是等差数列;
(2)记
,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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/52faf3b76dc0a7b7228229c691835888.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf48cd99db12af9a0652d37ffbbd348.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3e74fcd0b38bb7bbe6f0d8d2d4a256.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6e9dcb0f39c73017c4f41f5efd010e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a62da90466893b3dee8d41b92be7307.png)
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解题方法
6 . 如图,设点
是抛物线
的焦点,直线
与抛物线
相切于点
(点
位于第一象限),并与抛物线
的准线相交于点
.过点
且与直线
垂直的直线
交抛物线
于另一点
,交
轴于点
,连结
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/bf7e4ed4-4242-43dc-8e62-21836780ebe9.png?resizew=192)
(1)证明:
为等腰三角形;
(2)求
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531fc91e66179b770d8a89e2e7ac8cda.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/bf7e4ed4-4242-43dc-8e62-21836780ebe9.png?resizew=192)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a9bf6bda9363dbef5f6ff4bf6a5edf.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
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名校
解题方法
7 . 如图,已知抛物线
的焦点为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/f94cfe30-8d9b-4fa0-a106-e1f4a59a7d3a.png?resizew=134)
若点
为抛物线上异于原点的任一点,过点
作抛物线的切线交
轴于点
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
,
是抛物线上两点,线段
的垂直平分线交
轴于点
(
不与
轴平行),且
.过
轴上一点
作直线
轴,且
被以
为直径的圆截得的弦长为定值,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e48f28aeccf369df5980ac787e9e313f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/f94cfe30-8d9b-4fa0-a106-e1f4a59a7d3a.png?resizew=134)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22fd644cd54380df6f9f27c75bb2450e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c6ba69264c8f203cd756581bc6280a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc5bc4d240236523c95e3ca839dfbb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218590c23e700d37ab514bd8f8430edb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
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名校
8 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35b71cdc66da4babe1f9360a0a6894a7.png)
(1)讨论
的单调性.
(2)若
存在两个极值点
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35b71cdc66da4babe1f9360a0a6894a7.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/387b881b805d81fc2729f28aaacf284d.png)
您最近一年使用:0次
2019-10-22更新
|
1756次组卷
|
9卷引用:浙江省台州一中2019-2020学年高三上学期期中数学试题
浙江省台州一中2019-2020学年高三上学期期中数学试题山东省临沂市第一中学2019-2020学年高三上学期10月月考数学试题湖北省百校大联盟高三上学期10月数学(理)试题2019年山东省新高考备考监测高三上学期10月联考数学试题湖北省恩施土家族苗族自治州高级中学、十堰一中、十堰二中等2019-2020学年高三上学期10月联考数学(理)试题湖北省黄冈市麻城市2019-2020学年高三上学期10月月考数学(理)试题2020届福建省仙游第一中学高三上学期月考数学(理)试题江苏省扬州市高邮市第一中学2020-2021学年高三上学期10月第二次学情检测数学试题(已下线)专题17 盘点利用导数证明不等式的五种方法-1
9 . 已知数列
的前
项和为
,且满足
,
(
).
(Ⅰ)求
的值,并求数列
的通项公式;
(Ⅱ)设数列
的前
项和为
,求证:
(
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd2327505bcd9988e066d3e27afe22dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe61d313eeca8ba47478a9de40540db8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(Ⅱ)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.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/06fb483ba3554820d6ded6b46a55b099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
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10 . 如图,已知抛物线
的焦点为
,准线为
,过点
的直线交抛物线于
,
两点,点
在准线
上的投影为
,若
是抛物线上一点,且
.
![](https://img.xkw.com/dksih/QBM/2020/4/14/2440882175598592/2441210695991296/STEM/19d4e623-8068-4f86-95e4-f62dab55cf63.png?resizew=157)
(1)证明:直线
经过
的中点
;
(2)求
面积的最小值及此时直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/7f9e8449aad35c5d840a3395ea86df6d.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1384ffba86ff08ce9e783d5d1bc51686.png)
![](https://img.xkw.com/dksih/QBM/2020/4/14/2440882175598592/2441210695991296/STEM/19d4e623-8068-4f86-95e4-f62dab55cf63.png?resizew=157)
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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