已知函数
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)当
,求函数
的极值;
(2)设
,若存在
,使得
成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fca46a448b8b2df79944d14d3d3f753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd456469aaa6dafb1e275183d217435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6293b4e2efcf34d224adb98179a17663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e067929b351d76847ff18d71410df54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c6ce02259a85ea191541f4a708738f1.png)
更新时间:2017-07-22 10:22:48
|
相似题推荐
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐1】已知函数
.
(1)证明:当
时,
在区间
上存在极值点;
(2)记
在区间
上的极值点为m,
在区间
上的零点的和为n,请比较2m与n的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d6d8674fa5d0b31ad5d1f5a26c54332.png)
(1)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d01dc2d99655cf7598837cb0886166ed.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d01dc2d99655cf7598837cb0886166ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55cfcbb5c5950e18a8452b38bb17036.png)
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解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐2】已知函数
(
为自然对数的底数).
(1)若函数
,求函数
的极值;
(2)讨论函数
在定义域内极值点的个数;
(3)设直线
为函数
的图象上一点
处的切线,证明:在区间
上存在唯一的
,使得直线
与曲线
相切.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0640867120ce9a915c3c8d670c29c36c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bca4be345087f993a4078e16c16608e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b829a520cffda19199eea301106c2c77.png)
(3)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb57bb18755127be041d346444a4743e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
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解答题-问答题
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【推荐3】已知
为自然对数的底数,
为常数,函数
.
(1)求函数
的极值;
(2)若在
轴的右侧函数
的图象总在函数
的图象上方,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013084417aeb65e95f67a35af146167d.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91bb0d290ce1591625a587fbcfb7d750.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-证明题
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较难
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【推荐1】设函数
,
,其中
恒不为0.
(1)设
,求函数
在x=1处的切线方程;
(2)若
是函数
与
的公共极值点,求证:
存在且唯一;
(3)设
,是否存在实数a,b,使得
在(0,
)上恒成立?若存在,请求出实数a,b满足的条件;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f087038c57e3dac2704d3708dca77db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48861869fa71c279cd781b44902df117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2775ffdf695af2d263f0ea93ac5904.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb139ee85935865d50d17f7fac25e35f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3dca0baa16dc7dc43fa9bd2b938100a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5695c10b792a2a05f47343a4a09cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e055bc46d3fa50e79532ec5b3665d99b.png)
您最近一年使用:0次
解答题-问答题
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较难
(0.4)
名校
解题方法
【推荐2】已知函数
的最大值是
.
(1)求实数
的值;
(2)设函数
,若
,使
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dfcbb605fb5c0c117fcb73a274656b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11df92f86c97ed3aa0e153a19e28fbb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35eac3ba2858adffcd1f8052cd795269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2654e159f9f96ba8862582fb648778d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
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【推荐3】已知函数
,
.
(1)当
时,求曲线
在点
处的切线方程;
(2)当
时,求函数
的单调区间;
(3)当
时,函数
在
上的最大值为
,若存在
,使得
成立,求实数b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff6771d2cb33e5cda49c9492dd06dea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28ed05d03d2eb0451ebc042dfa71a9aa.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d217c7b12e12e5fb67472452518859ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51e2b8f615b2cc7eca7fda25efb507d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbcdc9391830e0e926356e4112af1c31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53224898de85a85058ad336490bbbaa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d97bfcc253057a6c86a51dc140476c9b.png)
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