已知函数
,若正实数
,
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6585b0463e20f889f499557a9b1e88e1.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/584eac65ed48d878314dc04ded0b319b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f78ae07b1452e4f9dd8ba93db61d17.png)
2023高三·全国·专题练习 查看更多[1]
(已下线)第二篇 函数与导数 专题6 函数周期性、对称性、拐点 微点2 函数的拐点与对称中心
更新时间:2023-04-20 17:04:24
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解答题-问答题
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较难
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【推荐1】已知函数
,
.
(1)若
时,求函数
的最小值;
(2)若
,证明:函数
有且只有一个零点;
(3)若函数
有两个零点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88349907f0dd354f7083d172f44f3da6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e83ed385840b832b0904d1fb38c4ef1.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c547c64dc542c2d192a6ece476fc9bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bad3ed9a2c863423c2903b89add11b2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐2】已知函数f(x)=ax﹣(a+2)lnx
2,其中a∈R.
(1)当a=4时,求函数f(x)的极值;
(2)试讨论函数f(x)在(1,e)上的零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966a5aefa71dfa45ee24d7f9ee8e4c3b.png)
(1)当a=4时,求函数f(x)的极值;
(2)试讨论函数f(x)在(1,e)上的零点个数.
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解答题-证明题
|
较难
(0.4)
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【推荐1】已知函数
.
(1)求函数
的单调区间与极值.
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31a0efdaa25f1ffebfe00ea020e734.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969e0ea877612922fe8b9d36ff188d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/131d461278bf057f60daa7677a245a62.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】已知函数
.
(1)若函数
的最小值为2,求
的值;
(2)当
时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c20289857a0c068804d8ac74ca3dcbc.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e01b6fb6a1c7a895df528382a5583444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92ce432f315ea0854e473df8b776d678.png)
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解答题-证明题
|
较难
(0.4)
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【推荐3】函数
.
(1)当
时,求函数
的单调区间和极值;
(2)当
时,有
恒成立,求实数
的取值范围;
(3)求证:
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34d2213f77ab75e0bcb2e713a833890f.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b063aca0818b38e2103da413e781631.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58196b9e63ec00aa1119052b6de6ae12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f91adccd7f8b654e68ee2696e14fd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca1d86c9f078347773f700fee49d1d8.png)
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