已知函数
.
(1)讨论函数
在区间
上的单调性;
(2)当
时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba0590bfe6fee53debda0623143c94c.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6d804ef44bfc64f824b0ccef71765e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8e1dd8da540badcb9a8f427c5b202e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3eb9ebd102d8259bb014ce9a073a609.png)
20-21高三·青海西宁·开学考试 查看更多[3]
更新时间:2022-08-14 16:43:13
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解答题-证明题
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解题方法
【推荐1】已知函数
.
(1)若
在
处的切线与直线
平行,求
的极值;
(2)若函数
的图象恒在直线
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①求实数
的取值范围;
②求证:对任意正整数
,都有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b14bbe3d846ac365ea74386cf89222.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faa64c2641eabe1f9e93ae50a4e95fe4.png)
![](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/c50866229ec5a3640fb250f9bd2192b3.png)
①求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
②求证:对任意正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff47f9477a667cb16c41126959c5dc7.png)
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较难
(0.4)
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【推荐2】已知函数
,其中
且
.
(1)讨论
的单调性;
(2)
,有
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a296954783ea9e42fca8571c259330af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
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(1)讨论
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(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6422b9c2e93a91fe9e39ce4d9dabb0fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1bad590dfe276218eb0f0e7a6161e14.png)
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【推荐1】设函数
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(2)当
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(1)求
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(2)当
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【推荐2】已知函数
.
(1)当
时,讨论函数
的单调性;
(2)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb01edefabfe2e8378b47cac4ffcfda.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e8dce6c6bd9ea640a816e70b30b6b24.png)
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(0.4)
【推荐3】已知函数
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(1)求函数
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可作曲线
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的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a69fa47e54f69dadd1cd686737843fa7.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29e9f5c87689d0b07f6c9a07ab98845.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dda1d7b3982b398ffa32f3dbfdfe787.png)
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