名校
解题方法
1 . 已知数列
为数列
的前n项和,且
.
(1)求数列
的通项公式;
(2)求证:
;
(3)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa2400f7c3789ea51e238dc193167102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a370de02d7c4e5e7bf601eba5de016b4.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946cca301525e6dcb842ea04dde3b1db.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5950369eb310c285e656600a5d8215.png)
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2022-09-23更新
|
2388次组卷
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9卷引用:湖北省黄冈市2022-2023学年高三上学期9月调研考试数学试题
2 . 已知函数
恰有三个零点
.
(1)求实数
的取值范围;
(2)求证:①
;②
.(两者选择一个证明)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dfdab12b2d05b059cf8d15a0a40789b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcee20976de0e0e8c1ccd7a951674691.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求证:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836431f422ae196307dc7e08443ceb48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c62d118963f860b7b4b576f444a95a9.png)
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名校
解题方法
3 . 已知函数
.
(1)求证:函数
在定义域上单调递增;
(2)设区间
(其中
),证明:存在实数
,使得函数
在区间I上总存在极值点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da85eb544f1b8ff532d4c2a3c8764d0f.png)
(1)求证:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e07062bde69560336def001c925eb7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb9dfa7ecdfa37e643c51193a388836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d8047f0a8bd0cf4e250cd0fe80093b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bbd86a6b6493a67696125835eea5f76.png)
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4 . 已知函数
,其中
.
(1)求函数
的单调区间;
(2)当
时,
①证明:
;
②方程
有两个实根
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9364cf34c6ad9238b8f40bd2f5b01c5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
①证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13361fca8e9ae964ff1451234b6cafd7.png)
②方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb2e46f49adba6036e2624639a1b966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684bcf84f0a266515bfafde0da903050.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91047208021f0b48b20cea2ad7fd99a7.png)
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名校
5 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef290c72466c30bc20d7414418cfaee.png)
(1)若函数
在点
处的切线斜率为0,求a的值.
(2)当
时.
①设函数
,求证:
与
在
上均单调递增;
②设区间
(其中
,证明:存在实数
,使得函数
在区间
上总存在极值点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef290c72466c30bc20d7414418cfaee.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea59cee971344ed593ff082a65d177c2.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
①设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1899b95e2442b6a08a5a134b36ed7c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/112d3c32a1a43115e1f57a7c910a7840.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7754cc9374c8193dadb6875fb8a3fefb.png)
②设区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e07062bde69560336def001c925eb7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb9dfa7ecdfa37e643c51193a388836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d8047f0a8bd0cf4e250cd0fe80093b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bbd86a6b6493a67696125835eea5f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
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名校
解题方法
6 . 已知函数
在点(
,
)处的切线方程为
.
(1)求a、b;
(2)设曲线y=f(x)与x轴负半轴的交点为P,曲线在点P处的切线方程为y=h(x),求证:对于任意的实数x,都有f(x)≥h(x);
(3)若关于
的方程
有两个实数根
、
,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32eaaee345fb3c2941c1700f51ac094d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a32822a106d217ffdec43557a236f786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0c949fc6c21dd3e7d3f56c97ad8715.png)
(1)求a、b;
(2)设曲线y=f(x)与x轴负半轴的交点为P,曲线在点P处的切线方程为y=h(x),求证:对于任意的实数x,都有f(x)≥h(x);
(3)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d43ee69053dce7e1c0fde08668389b42.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/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32cda68b4b1a524acf26e5eb623373b5.png)
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2022-03-29更新
|
3208次组卷
|
8卷引用:第12讲 双变量不等式:剪刀模型-突破2022年新高考数学导数压轴解答题精选精练
(已下线)第12讲 双变量不等式:剪刀模型-突破2022年新高考数学导数压轴解答题精选精练(已下线)第29讲 割线法证明零点差大于某值,切线法证明零点差小于某值-突破2022年新高考数学导数压轴解答题精选精练(已下线)天津市南开中学2022届高三下学期二模数学试题(已下线)专题9:双变量问题天津市耀华中学2022届高三下学期统练12数学试题天津市南开中学2019-2020学年高三10月月考数学试题天津市第一中学2020-2021学年高三上学期第三次月考数学试题(已下线)重难点突破06 双变量问题(六大题型)
7 . 已知函数
.
(1)若
在
上单调递增,求实数a的取值范围;
(2)当
时.
(i)求证:函数
在
上单调递增;
(ii)设区间
(其中
),证明:存在实数
,使得函数
在区间I上总存在极值点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef290c72466c30bc20d7414418cfaee.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7754cc9374c8193dadb6875fb8a3fefb.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
(i)求证:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1899b95e2442b6a08a5a134b36ed7c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7754cc9374c8193dadb6875fb8a3fefb.png)
(ii)设区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e07062bde69560336def001c925eb7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb9dfa7ecdfa37e643c51193a388836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d8047f0a8bd0cf4e250cd0fe80093b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bbd86a6b6493a67696125835eea5f76.png)
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名校
解题方法
8 . 把抛物线
沿
轴向下平移得到抛物线
.
(1)当
时,过抛物线
上一点
作切线,交抛物线
于
,
两点,求证:
;
(2)抛物线
上任意一点
向抛物线
作两条切线,从左至右切点分别为
,
.直线
交
从左至右分别为
,
两点.试判断
与
的大小关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/471ebe959b8ff2bbabce1f0f09a36e28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27fe004046f183e83376ce219c9d1bb0.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194b8ab194c7d299d5c3e0f09ec18384.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2007972af3341f27fbc32ce62dfce5e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.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/1f30acc34f4ee1077532ae6808af2ab2.png)
(2)抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22962a2ad892cb6b14ab039a06e8cdc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.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/79cc25bc9e9c48fd18a60b95b64bb499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920ff4e858ac0ed5e5706bb77bfd5c9e.png)
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2022高三·全国·专题练习
9 . 证明不等式:
(1)当
时,求证:
;
(2)已知函数
,设
,
,且
,证明:
.
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d58567d3cb3137e68b7ff1671cd8433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/322f570f107c1fb33475c3f119043edb.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c7ed99a74e126a05cb520f19c094020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45dddee525114c09ee0d1205aed6e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b3b54e0dcdc081d45fb3df933cddc29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb78b356435d24da36f7fce57026d8d.png)
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2022高三·全国·专题练习
10 . 已知函数
,
,在点
处的切线方程记为
,令
.
(1)设函数
的图象与
轴正半轴相交于
,
在点
处的切线为
,证明:曲线
上的点都不在直线
的上方;
(2)关于
的方程
为正实数)有两个实根
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db9ae6e655cae4fbc0f5591329ecd464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d65f426baa7cc50d42c9eb47cbcff65a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f5f4dffc65e0fc5d24367a9d4e5c997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f492a6d35db1c62b0a4411f741235a96.png)
(1)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.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/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907085c87a6b33ce4b84c86210f9a521.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/877d540cfbe3cd131d513d4da1250a64.png)
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