已知函数
.
(1)求此函数
的单调区间;
(2)设
.是否存在直线
(
)与函数
的图象相切?若存在,请求出
的值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac2a66e2f5282b3b595b68128b227f0f.png)
(1)求此函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5772cf771ac83052aaf7b35e794b52d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b97b295f88972ba1c7e3cefda0885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
更新时间:2020-02-07 22:33:46
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【推荐1】已知函数
和
,
(Ⅰ)设
,求函数
的单调区间;
(Ⅱ)当
时,
为函数
图象与函数
图象的公共点,且在点
处有公共切线,求点
的坐标及实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff05b0780c62c74451ec07f7b8f4a4ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce449d8002a3da27fd9df2abb7866bb.png)
(Ⅰ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7863b54185da5a3f1a765e1aa0577e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0daddde957060b740e9347efb86605bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff05b0780c62c74451ec07f7b8f4a4ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45c99e1dc1ae52532aea295e435a1e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c83d55bbc1e9eb4ee895ce58c275d73.png)
(1)若函数
的图像在公共点P处有相同的切线,求实数m的值和P的坐标;
(2)若函数
的图像有两个不同的交点M、N,求实数m的取值范围;
(3)在(2)的条件下,过线段MN的中点作x轴的垂线分别与
的图像和
的图象交于S、T点,以S点为切点作
以T为切点作
的切线
,是否存在实数m,使得
?如果存在,求出m的值;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c83d55bbc1e9eb4ee895ce58c275d73.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47579adc1d920db4b4a6af53f2a8f837.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47579adc1d920db4b4a6af53f2a8f837.png)
(3)在(2)的条件下,过线段MN的中点作x轴的垂线分别与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd330acca8e17f5ff9aca1f0f312df50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c198a6b9ef7b2eba4e0c9bbd7590ea7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd330acca8e17f5ff9aca1f0f312df50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eea5c8fe935beac660eda538e59cd43f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a5d6aeeed1250e42abd1fb455c45ac.png)
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【推荐1】已知函数
,
,
.
(1)若函数
在
上是单调函数,求实数m的取值范围;
(2)当
时,
(i)求函数
在点
处的切线方程;
(ii)若对任意
,不等式
恒成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f781c7b7d5c6c0c98c41cb54bc4a0df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2645398c3946e1a9282c219824f167d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2645398c3946e1a9282c219824f167d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
(i)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
(ii)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2645398c3946e1a9282c219824f167d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb959f02cb0299d1a390f55f57f727f.png)
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解题方法
【推荐2】已知函数
.
(1)若
在
上单调递增,求实数
的取值范围;
(2)若
,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf26392c859f5d05fe99f69e1ba0a46.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/579e2c39e6c0a640357e3b0ccd6f954a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47afdd202bcea1c0a13bfae197bc8e66.png)
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解答题-证明题
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较难
(0.4)
名校
解题方法
【推荐1】已知函数
,其中常数
.
(1)若
,令
,求
的单调递增区间;
(2)当
时,不等式
恒成立,求实数
的取值范围;
(3)若
,且
时,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0fa4137b76d72ae83f9358c4b2aa74a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c765461ae1a6c70f5cbdcb6c932a22b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc4136bd17997e11a7f8abcb19f9018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b916c6d3fb2fdc67421489f207c93903.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08513768531f0c9352ba8581a5523c83.png)
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解答题-证明题
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较难
(0.4)
【推荐2】已知函数
.
(1)若曲线
在点
处的切线为
,求实数
的值;
(2)讨论函数
的单调性;
(3)若函数
有两个零点
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141d819347adf2c2c8f2bd2c99115809.png)
(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9f8845aa2b51c460f2d798c9f62fa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0985b973395bcd371cd1e26d3fcd1c36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ca13a93b5f401c0d39ba52b0cffcb0.png)
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