已知函数
.
(1)若曲线
在点
处的切线的斜率为
,求实数
;
(2)若
,求
的极值;
(3)当
时,
在
上的最小值为
,求
在该区间上的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae8648da4f41d8236b736e92ef08918.png)
(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/622a3bcf97cdce271d1112ccab1d542b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01317332a203c898536b1d0459f51d23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/606ef9cb8c9c4f61ab2acc4c11fec693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dccf1f9faac56117d6d3dd1dddd286d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37f7bfbf53707fe9aa4fb9570632542d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
更新时间:2016-12-04 04:01:09
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知函数
.
(Ⅰ)求曲线
的斜率等于
的切线方程;
(Ⅱ)设曲线
在点
处的切线与坐标轴围成的三角形的面积为
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f995aae158765b1c71eebce5773ab23c.png)
(Ⅰ)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
(Ⅱ)设曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/569669e3d8add1e2d7f6c6551c343ebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf37898700f118daeac10fe61b10c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf37898700f118daeac10fe61b10c43.png)
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【推荐2】已知函数
和
,其中m,n为常数且
.若存在斜率为1的直线与曲线
,
同时相切.
(1)若曲线
在点
处的切线斜率为1,求
;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c42b68c6780cca6d7cb6784552ba4bdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/368882a5ba333e84c2b44febf20c9b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4a555b881747f0f9339890ccb6d62c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89f4eff3125c5e63a994ba1ad5be58e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f749e2471684db63546a9ce817a6415.png)
(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f749e2471684db63546a9ce817a6415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f862efba4214079156739474251ec2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b12a4eecd249473a831d0ee472470240.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0be44077d42cfffece905b1af13e000.png)
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解题方法
【推荐1】已知函数
,
.
(1)若
是
的极值点,求函数
的极值;
(2)若
时,恒有
成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb31c0e88beccc30ea4d44a5f9da441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6acb0f1ac694dd177e99fc385f23318.png)
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适中
(0.65)
名校
【推荐2】已知函数 f(x)=ax+(1﹣a)lnx+
(a∈R)
(Ⅰ)当a=0时,求 f(x)的极值;
(Ⅱ)当a<0时,求 f(x)的单调区间;
(Ⅲ)方程 f(x)=0的根的个数能否达到3,若能请求出此时a的范围,若不能,请说明理由.
![](https://img.xkw.com/dksih/QBM/2015/10/26/1572264739659776/1572264745844736/STEM/40668eae8d4145ec8ea121375cbf3034.png)
(Ⅰ)当a=0时,求 f(x)的极值;
(Ⅱ)当a<0时,求 f(x)的单调区间;
(Ⅲ)方程 f(x)=0的根的个数能否达到3,若能请求出此时a的范围,若不能,请说明理由.
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【推荐3】已知函数
,直线
.
(1)求函数
的极值;
(2)试确定曲线
与直线
的交点个数,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e214541020a71532f45bb6828ca9baf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0d6d0cfe389abca252332223b5da17.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)试确定曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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解题方法
【推荐1】已知函数
.
(1)求函数
在
上的最大值;
(2)若对于任意的
,总有
,分别求出a,b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17d6a778a3cc1fed3abdde70a968f3f0.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ff16773bd63036c8c881d8417ab555.png)
(2)若对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adb2b8600ecb8ef110d829f4fa96fee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d6f007d8bf33a04c3846a1175f5950.png)
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解题方法
【推荐2】如图,设椭圆
:
(
),长轴的右端点与抛物线
:
的焦点
重合,且椭圆
的离心率是
.
![](https://img.xkw.com/dksih/QBM/2020/12/12/2612531495436288/2614155589541888/STEM/b2b29fc8-8527-4171-9503-aac099ee0a51.png?resizew=235)
(1)求椭圆
的标准方程;
(2)过
作直线
交抛物线
于
,
两点,过
且与直线
垂直的直线交椭圆
于另一点
,求
面积的最小值,以及取到最小值时直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://img.xkw.com/dksih/QBM/2020/12/12/2612531495436288/2614155589541888/STEM/b2b29fc8-8527-4171-9503-aac099ee0a51.png?resizew=235)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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解题方法
【推荐3】函数
,若对
,求实数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c12e2a2b7221da267b8305b8ddc9349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e434b7d90fc1887fa98937dc3a59e926.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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适中
(0.65)
【推荐1】已知函数
(
),其中
是自然对数的底数.
(1)当
时,求
的极值;
(2)若
在
上是单调增函数,求
的取值范围;
(3)当
时,求整数
的所有值,使方程
在
上有解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/991908cbb0e716f6e77deedd90f149f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed2f5e11cef1a7062aac81b72d70b80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e3f927af4a08921f9cb8da10d3f9cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09723a50d2bce12318e1b9b2c5c02621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb0381514dc997c3802b84868805cbf.png)
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适中
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【推荐2】已知函数
,其中
.
(1)若
,求
的单调区间;
(2)若
恰有2个不同的极值点,求
的取值范围;
(3)若
恰有2个不同的零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/366b4597ba84bb72e44f1017d56b6e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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