设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6adc27c3e7fb47aa35e4ddf3b6f7c0d8.png)
(1)当a=b=1时,求函数f(x)的图象在点(e2,f(e2))处的切线方程;
(2)当b=1时,若存在
,使f(x1)≤f'(x2)+a成立,求实数a的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6adc27c3e7fb47aa35e4ddf3b6f7c0d8.png)
(1)当a=b=1时,求函数f(x)的图象在点(e2,f(e2))处的切线方程;
(2)当b=1时,若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1097bcf81d367a01b647b3e0c0d0416.png)
18-19高二下·宁夏石嘴山·阶段练习 查看更多[2]
宁夏回族自治区石嘴山市平罗中学2018-2019学年高二下学期第一次月考数学(理)试题(已下线)第七章 导数与不等式能成立(有解)问题 专题四 双变量能成立(有解)问题的解法 微点1 双变量单函数能成立(有解)问题的解法
更新时间:2020-01-07 23:54:57
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解题方法
【推荐1】已知函数,
,点
,设曲线
在点A,B处的切线的斜率分别为
,
,直线
的斜率为k.
(1)若
存在极小值,且极小值为0,求实数a的值;
(2)若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edceb1f45633fa5111f9d7fe05177fc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6666042e9d296a45b4c212367ea25914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47fe863357e026cd960fea54a3ac827d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4ca086fca586da964c007788de45cc.png)
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名校
【推荐2】已知函数
.
(1)求曲线
在点
处的切线方程;
(2)设
,
为两个不相等的正数,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c7ed99a74e126a05cb520f19c094020.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)设
![](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/859458471c86ae39e0cc42d2d960d03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c23ca8543ec6408995a1461961e35c.png)
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【推荐1】在数学中,双曲函数是一类与常见的三角函数类似的函数,其中
,
分别称为双曲正弦、余弦函数.
(1)若
对任意
恒成立,求实数
的取值范围.
(2)①类比同角三角函数的平方关系,试写出
与
的一个关系式(无需证明);
②若
,存在
,
,使得
成立,试比较
与
的大小,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/053c6567b9eb6eb253eeb1dae56297c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e55c3ab25629d9cc8203751a639e824.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b9a175ae4a39a03e0a214b848dbe278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)①类比同角三角函数的平方关系,试写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4aa1ad922b527f8dd8d2277aec58bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3340cf143072ee3fc254c19ccd7f9ed5.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/207bf290c6d6791f1223122f2105b205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6680d7a8ddb53621cd8ee6b65d6dc229.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/008e77135f850cd4beab452480a591d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a78f1e165c15957f3e2ccb20d807b089.png)
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【推荐2】已知函数
.
(1)讨论
的单调性;
(2)若对任意的
,存在
,使得
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adab31dba50d0320c510a21e49d4913c.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca3c74f5e721d8e3277c7757fb9d657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐1】已知函数
的导数
为实数),
.
(1)若
在区间
上的最小值、最大值分别为
,求
的值;
(2)设函数
,试判断函数
的极值点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e6a15cedb7f2ec5efcf7806d98c695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf9befc3b336d83b83bcfcbc19c0752.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d188ec2580e273ce87e51653a2177ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9bc1d1f79c4f82e074170d7a433f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4331432f755c9fc5c194f2a5e564ca80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
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【推荐2】已知函数
,其中
…为自然对数的底数.
(1)若函数
在
处的切线与直线
垂直,求函数
在
处的切线方程.
(2)若对任意的
,
恒成立.
(i)求实数
的取值范围;
(ii)若函数
,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e0de943df08c0ad6bc565b5231989f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/872f7b170d31d1d464aba4f99e370721.png)
(1)若函数
![](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/18feaed4f3dd7698210ba302c81dca6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b60302d80d8613675bb3dd5c03164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/968d720c2e8215851f6db0d821037c8d.png)
(i)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(ii)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/225050a7d7e129932a57731eda4f1a7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ea7dde106b744f639a7be5869f762c8.png)
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