已知函数
,
.
(1)若
与
相切,求
的值;
(2)当
时,
为
上一点,
为
上一点,求
的最小值;
(3)
,使
成立,求参数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f30669833dca35a28f35abf384733b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9e3f1bded3af98c348abc230c1ea28a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbf785616045d41f62917779d91d4976.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6f5adf13b4214666292dd64b947741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af405a054bfe7fb7ce40e48d816467e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44e8bc37ed03f44470762748a8f942a.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/045748e3e58bfc29cf00ea0b80d2d56b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae17887ccf795c630b89ff5c9f72813a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2017-04-17 23:54:01
|
相似题推荐
解答题-问答题
|
困难
(0.15)
名校
【推荐1】函数
.
(I)函数
在点
处的切线与直线
垂直,求a的值;
(II)讨论函数
的单调性;
(III)不等式
在区间
上恒成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5a54269b708e0715fc0c0692da0e4d.png)
(I)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b2caf6048aa0807d8ba591963ff6e2.png)
(II)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(III)不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cd89e173e119ba05c7b2736d4558d7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64ec44e16c942d84044f6fb4d1ec9266.png)
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【推荐2】已知函数
.
(1)若
在
处的切线方程平行于直线
,求
的值以及此时的切线方程;
(2)若方程
在
上有两个不同的实数根,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f61460d52f081d206230d319fbba97ce.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/569669e3d8add1e2d7f6c6551c343ebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b979396a703fb14715ba39232f5786a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a18ca67c2770b98f36dbfd802595a95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐1】设函数
(其中
).
(1)若函数
在
处取得极小值,求实数k的值;
(2)当
时,若函数
在
上有两个不相等的零点,求实数k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/283447ca576fe0274ee1d28f4065a769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b97b295f88972ba1c7e3cefda0885d.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69d088db5484ea1d1f3dc2a893288243.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfd2c420c37780647832768c87aa46f.png)
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名校
【推荐2】极值的广义定义如下:如果一个函数在一点的一个邻域(包含该点的开区间)内处处都有确定的值,而以该点处的值为最大(小),这函数在该点处的值就是一个极大(小)值.
对于函数
,设自变量x从
变化到
,当
,
是一个确定的值,则称函数
在点
处右可导;当
,
是一个确定的值,则称函数
在点
处左可导.当函数
在点
处既右可导也左可导且导数值相等,则称函数
在点
处可导.
(1)请举出一个例子,说明该函数在某点处不可导,但是该点是该函数的极值点;
(2)已知函数
.
(ⅰ)求函数
在
处的切线方程;
(ⅱ)若
为
的极小值点,求a的取值范围.
对于函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d47db6b322f19cefcd70d0f8433917f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1459527045d2d138d1ee4b441aade53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55e6c43466d743ea37287656b85821c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/570e972f51cd1d11acfd80a01c0512fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55e6c43466d743ea37287656b85821c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
(1)请举出一个例子,说明该函数在某点处不可导,但是该点是该函数的极值点;
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae34b02b147bb49131a01316e07efaf.png)
(ⅰ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d1735755a0f13e329df682712dd1d6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
(ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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【推荐1】设
,已知函数
,
.
Ⅰ
若
恒成立,求
的范围
Ⅱ
证明:存在实数
使得
有唯一零点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980a8c4eb822aeb591ceacfe8a7aaa11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c150690bc8a4496cd49bbe44fe8403bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b5b76ee3bcd1abe78a0d22df47b4773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34bdf025f6472f99b0aa8849bbdcafa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
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【推荐2】已知函数
.
(1)若函数
与函数
在点
处有共同的切线
,求
的值;
(2)证明:
;
(3)若不等式
对所有
,
都成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64263fe2ca48e694c87496d61e63fb9f.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7a7772dacce9e7c7bc85b085036f01c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de624ef08ab0043a976aa9739a92c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/022dc6dc89a940eaaabfb8dcf0b4fb66.png)
(3)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a207c58782d151a3c73ee284309af6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/749f3c4b0c1e9301573e7a7df99cc410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/225504e566da119bb27468d88b7443fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐3】已知函数f(x)=ax+ln(x-1),其中a为常数.
(1)试讨论f(x)的单调区间;
(2)当a=
时,存在x使得不等式
成立,求b的取值范围.
(1)试讨论f(x)的单调区间;
(2)当a=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13ae4d4647da924966a01984af296be4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2a380aa8f21940fb7db6520c3c5455.png)
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