已知函数
.
(Ⅰ)当
时,求函数
的单调区间
(Ⅱ)设
,若函数
在
有两个零点,求
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c6a37d46f207202ecefc3b8b79a29f.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e9222ffc26c0e6bfbf252ab5d8a520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34a2a88ee844468fd2a1dc325e3ecc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9f2eb736fa888bff739b8d8362edb2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2020-11-12 16:28:37
|
相似题推荐
解答题
|
较难
(0.4)
【推荐1】已知函数
,其中
为常数.
(1)当
时,讨论
的单调性;
(2)当
时,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7345945148bc34b9c4eaedb529c6a15f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3adb9acead48e36b705874dc96979f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb53097a2bf60a0137552737fde2b5ba.png)
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解答题-问答题
|
较难
(0.4)
名校
【推荐2】已知函数
,
为实数.
(1)当
时,求
的单调递增区间;
(2)如果对任意
,
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20eb83f05322a99d5d2942e1fb8d9942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)如果对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae47b6ff942035b05bad9ea569533bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐3】已知函数
,
.
(1)求函数
的极值;
(2)证明:当
时,
在
上恒成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235922c3479ac4ee615292ad75c66b76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb84dc126d9171e08293fe6e8bec79c.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/933b0f15074e1a215e6979ea9cbfc252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4acda6b6464db27e1ec18a1522406d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
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解答题-证明题
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解题方法
【推荐1】已知函数
,
其中
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef278509c5a53f41402ecf1785c883e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927edda38c3ce61ef0381ea61ead8ec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ef228c9d31fea0f96f02b97c09e8eaa.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】已知函数
.
(1)若
,求曲线
在
处的切线方程;
(2)若关于
的不等式
在
上能成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/313a8876020169bd7f1bda1148b31ab4.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/052345291f0d07a45fa5687ac50065e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b8ba693e09a6e6722bf8e04ef3c440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】已知函数
.
(1)判断
的单调性;
(2)当
时,求函数
的零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/793d611e689986951b99307bbc0a6d53.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d65cd83710143ac3ae8f77b7e1f832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d91867b6946d333e6574d6f9e0d84d.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】已知函数
.
(1)当
时,证明:
存在唯一的极小值点;
(2)若
有两个零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/234cb87a296123d1d1a37d769c9a97f1.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.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)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐3】已知函数
(
).
(1)当
时,判断
的单调性;
(2)若函数
无零点,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545f542149c5a9f4ba19a5b815358e3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9154514e9d2a5b3e3eaa508adabbaa5.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐1】已知函数
(其中
是常数,且
),曲线
在
处的切线方程为
.
(1)求
的值;
(2)若存在
(其中
是自然对数的底),使得
成立,求
的取值范围;
(3)设
,若对任意
,均存在
,使得方程
有三个不同的实数解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ddea3fd5af1b89dcd12f8174fcdb04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baca30d4248a82988890bd032d159b25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1e134049f0428ef470167329f9f958.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20cda097a4e7c41100e573d8304ee066.png)
(2)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8234618ad13157c43b2ef9c6108e674f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e4d9dbc2b7201c06c225fcd954bd4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92634a7daabf9bce925f0d7507ea7526.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac27a75d9602d6b5558ac27719154c5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf039c46a25e331446c6ee1e9af3c82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20e258c0598cc43a382cce8bab8260a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题
|
较难
(0.4)
【推荐2】已知函数
(
为自然对数的底数,
),
(
,![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/7ec543e2f3ed4202a227921f1c084403.png)
),
⑴若
,
.求
在
上的最大值
的表达式;
⑵若
时,方程
在
上恰有两个相异实根,求实根
的取值范围;
⑶若
,
,求使
得图像恒在
图像上方的最大正整数
.
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/774be6ba2ea34e6f886f8b584eadf53a.png)
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/932e846e4ae24011aecc28827f47a1c6.png)
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/b4f89278276449f7946c978e0d17dd4c.png)
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/f704bcabb16248a9a7fea762f995b3b2.png)
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/5ac85cf246054604957bd3ef9e83462c.png)
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/7ec543e2f3ed4202a227921f1c084403.png)
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/46a6385c4f7e4f6ab3486db2b732e0ad.png)
⑴若
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/80501123903c4ccfb77694920f16ebc0.png)
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/0e85a03ea80544e69666802fe5752793.png)
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/28715dcb10944b62a6afee2b5e26d6eb.png)
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/94c42a43bcd242c58704d9fdb6c5cbb6.png)
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/49773b92791d40f48312d90e8c0e5dc5.png)
⑵若
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/9041b63700ff49a7883d5acc29134f34.png)
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/6dcf8538526c4d02b2432955a9976f81.png)
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/03d21194da804a198dc8118660c7e649.png)
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/7ec543e2f3ed4202a227921f1c084403.png)
⑶若
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/ee606cc69c4048039f4aad345f3f6381.png)
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/ddded7f70e684b2fab3a692d780f1e1c.png)
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/c8e4c84cf79a4748acb6748dce091430.png)
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/80cd6643b07d4e2bb7190aaa8ace06cf.png)
![](https://img.xkw.com/dksih/QBM/2017/1/31/1619474935947264/1619474936668160/STEM/5ac85cf246054604957bd3ef9e83462c.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐3】已知函数
.
(1)讨论
的单调性;
(2)判断方程
在
上的实根个数;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23a5bdfa502783d382a7f251ae2be801.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)判断方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338316b0fe50fdea0f2f75aec4c990dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a504d9de6dbb0753dc2e2b2c0b7f9e4a.png)
您最近一年使用:0次