已知函数
.
(1)求
的图象在点
处的切线方程,并证明
的图象上除点
以外的所有点都在这条切线的上方;
(2)若函数
,
,证明:
.(其中
为自然对数的底数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c7ed99a74e126a05cb520f19c094020.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1f84134092f31767ff9f7e8200a79fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4659c95581c58d8dc521d8ad320336d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bdf992ef1768052803c33cf270ac0f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad422556b651c96334782717567e1813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
更新时间:2022-07-09 08:04:17
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解答题-证明题
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适中
(0.65)
名校
【推荐1】已知函数
.
(1)若
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(2)当
时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450918f30f3888867dd1ef71fa6f477f.png)
(1)若
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(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
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解答题
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适中
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【推荐2】已知函数
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【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/207a021b8bc779452e8bb856bda3818e.png)
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3a34d6f60032718820c3da2b07786b.png)
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【推荐2】已知函数
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(1)讨论
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/830d3d9d07773420e93f5baabd7f1148.png)
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【推荐1】已知
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(2)设
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f786a5701dc1a8a015e8843c3360151b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5207aa3a627a574a1e12ae87dd609fdb.png)
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解题方法
【推荐1】已知函数f(x)=ax2﹣bx+lnx,(a,b∈R).
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(2)若b=0时,不等式f(x)≤0在[1,+∞)上恒成立,求实数a的取值范围;
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(0.65)
【推荐2】已知函数
.
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