已知函数
.
(1)当
时,讨论
的单调性;
(2)证明:当
时,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8dbfed1efce91fbd59095d025b1184.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655b06387179d53c1e474fcfcb408b1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87008291cdba83461d58dbc9426d777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b9a01c0b3ce60a5d651bc8f5cdd557f.png)
22-23高三上·贵州黔东南·阶段练习 查看更多[2]
更新时间:2022-12-11 06:04:42
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解答题-证明题
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名校
【推荐1】已知函数
.
(1)判断
的单调性;
(2)若
,求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6003d1da50cad9785a6e9c596f2d6b0.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f13c4e77394e612a85ce321d88ff358a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ca13a93b5f401c0d39ba52b0cffcb0.png)
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【推荐2】已知函数
.
(1)若曲线
在点
处与
轴相切,求
的值;
(2)求函数
在区间
上的零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233c34d8a9d64da27d68a8c8280025e3.png)
(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2763b57a7399653fbded5264f0cee150.png)
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解题方法
【推荐3】设
是
在点
处的切线.
(1)求
的解析式;
(2)求证:
;
(3)设
,其中
.若
对
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d3e0c1b288d8cc073a1c80d16722529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1242ec96ac54e2fd418988d5190a88.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b4955c5adc717b7f6f0b975e0724ff5.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3a067bc2c65da5c3997df2fd78f1946.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5de89467e97506fbd3f79833900c203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48350c9f896c18a64f27867ca81c9be2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐1】已知定义在
上的函数
.
(1)若
,讨论
的单调性;
(2)若
,且当
时,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3a2926e2a635316a9e011d3d3455fa4.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66692ec49a458f9e48c7315d03dfc37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b426082957b3e73ede8e71abb37f50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐2】设函数
.
(1)已知
在点
处的切线方程是
,求实数
,
的值;
(2)在第(1)问的条件下,若方程
有唯一实数解,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d1303b891a79b9198aa4b0f30bd197.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81158db42116f74e7b26e100f88dd535.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e212cdbfba6610bc55df2c1a737407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)在第(1)问的条件下,若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1beb197da8979ffa46fa5275cf447b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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【推荐1】已知函数f(x)=
lnx﹣1(m∈R)的两个零点为x1,x2(x1<x2).
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc0cabb02898d220dc0a56cc5443bbfb.png)
(1)求实数m的取值范围;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8ffbcca657f675b329dcfee932da74.png)
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解题方法
【推荐2】已知函数
,其中
.
(1)当
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在区间
上的最大值;
(2)若
,证明对任意
,
恒成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c9425ad374efb722452ce3317740ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20082e474b757273b4b83b13f16ddb61.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db0eb7b60e88da1d807797cb17f85d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f69389b644334fcbb04e6af5cb59c385.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4171bee8575f260751a2bae36837e03c.png)
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