设向量
.
(1)讨论函数
的单调性;
(2)设函数
,若
存在两个极值点
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6bb2521ea04dcf899284058cbdc2086.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8557a0348dc1a2b9d1cf1cf04f62abc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca579894dad67bc82cb715fd48e0d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963fa7575063ade6a406a3cc59a7ee42.png)
2023·陕西安康·一模 查看更多[3]
陕西省安康市2023届高三上学期12月一模理科数学试题内蒙古阿拉善盟第一中学2022-2023学年高三上学期期末考试数学(理科)试题(已下线)拓展七:导数双变量问题的7种考法总结-【帮课堂】2022-2023学年高二数学同步精品讲义(人教A版2019选择性必修第二册)
更新时间:2022-12-12 20:16:16
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解答题-证明题
|
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(0.15)
名校
解题方法
【推荐1】已知函数
.
(1)当
时,求函数
的单调区间;
(2)当
时,不等式
恒成立,求实数
的取值范围.
(3)求证:
(
,
是自然对数的底数).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3dd255964135020334e442608ba952d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d032e5867d5f33a72d160f2a45c2340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4cbc7b067862a3d9c6789b392fc068.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c7572463225bb3b65cb371f4496440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41ff1370f249839f7104bbda9e5b405.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
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【推荐2】已知函数
.
(1)求函数
的单调区间;
(2)当
时,证明:函数
有两个零点;
(3)若函数
有两个不同的极值点
(其中
),证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24bcebb1b04e3b700973b082889dd13.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9fdd2e38a61463831412e20f5e4184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6aa7bfe9c31035b89c59f413242f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d277c051b0c07ce2983f33470a343aa1.png)
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【推荐1】设函数
,其中
.
(1)讨论函数
的单调性;
(2)令
,当
时,函数
在定义域内有极值点
,其中
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffac0ccb42680079ae34097482bcaaca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f49d8d4c109398ff198e6c0ed63131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c574b8c3988ea86be9b816b63fb23cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32a306d6cd5034071906f72e3fbeb907.png)
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【推荐2】已知函数
.
(1)讨论函数
的单调性;
(2)若函数
有两个零点
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e84da1d6eb73a092cdaf109f2477553.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.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/cf533b599e4fd6e110ec876d93ea0d23.png)
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【推荐1】已知函数f(x)=lnx﹣ax2﹣bx.
(1)当a=0时,f(x)有最大值﹣1,
(ⅰ)求实数b的值;
(ⅱ)证明:当x>1时,2lnx<(x﹣1)ex;
(2)a
时,f(x)存在两个极值点x1,x2(x2>x1)且f(x2)﹣f(x1)的取值范围是
,求b的取值范围.
(1)当a=0时,f(x)有最大值﹣1,
(ⅰ)求实数b的值;
(ⅱ)证明:当x>1时,2lnx<(x﹣1)ex;
(2)a
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a162dc68b1f6889351e5727b6d2d014e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2c85531c49380d73f6b0f0d751d575.png)
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【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21d74e7de162504ce349c0a380127f8.png)
(1)若
在
处的切线斜率为
,求函数
的单调区间;
(2)设
,若
是
的极大值点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21d74e7de162504ce349c0a380127f8.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5294d690e81bbc5c4898c97c538953f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/effd486acb416eb05e02a19727227bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐3】
.
(1)若
为
的极值点,求实数
;
(2)求实数
的取值范围,使得对任意的
,恒有
成立.
注:e为自然对数的底数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f67b229930e967a18fbe17bf2cbbbaa.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187c21027ff08411931d32c530b64fd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f524273e37a488681f844e58556c4bec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e77b6ca75d28a963c79ee8507349f1d3.png)
注:e为自然对数的底数.
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【推荐1】已知函数
.
(1)当
时,求曲线
在点
处的切线方程;
(2)若对
,
,不等式
恒成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899d40b293c6e4d460165858d72c19d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)若对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3151523ac8dd968d9fe3dbf85c614141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66ab7d51d435424be10a542b1f9c87b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06748b24b15703ae09588aaf53a797d9.png)
您最近一年使用:0次
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【推荐2】已知函数
(
).
(1)讨论函数
的单调性;
(2)若
两个极值点
,
,且
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be893e93ba687d0b61c26578b1e93a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.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/f0551890086e3d079be6ab9cae5ffd42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13e21ac584efecd770c2dd9d2e83803a.png)
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【推荐3】若函数
有两个零点
,且
.
(1)求a的取值范围;
(2)若
在
和
处的切线交于点
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f126f4d7e16a082b9c4eed2984e3a4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
(1)求a的取值范围;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9df2062940530232ab124a571e951ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb652143b43cc9439a347b2b1dc5cf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1947266946e35d8f997e6572c27ac6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b54bf9c3cd56e371f4ce78a408409441.png)
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