设函数
.
(1)当
时,求函数
的单调区间;
(2)当
时,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24dbb73108a65ce222beaa73a6766d5e.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b7393fc425948d4261bb6c7d67f88e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97e3abdc5c1360921500599e34be9180.png)
更新时间:2020-09-21 17:22:35
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解答题-问答题
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较难
(0.4)
名校
【推荐1】已知函数
.
(1)当
时,求
的单调区间;
(2)若函数
在
上无零点,求
最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89a6eb1b39894b8a890caa51eeb5dce4.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d655ee6d4c2285b6f59652360862d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐2】已知函数
.
(1)当
时,讨论函数
的单调性;
(2)若
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4655ff45ef0bc8fb2904804790b62780.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48adb8a59b5c02fad5eada1b35171cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9ede2e55724383dd1093fc7fcdb59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
您最近一年使用:0次
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【推荐1】已知函数
.
(1)当
时,求函数
的单调区间;
(2)若
,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb6aea8f1dc7e321e6ef2e1449bf3ab0.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dd82b5223c2a708c1729db2a3750990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c27fc0f30e4ff9bbe42ba8fbbaaf33.png)
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真题
【推荐2】设函数
.
(Ⅰ)讨论函数
在
内的单调性并判断有无极值,有极值时求出极值;
(Ⅱ)记
,求函数
在
上的最大值D;
(Ⅲ)在(Ⅱ)中,取
,求
满足
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45221029ec6b37daceb1d1ad7fc49acc.png)
(Ⅰ)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14151dff9eab23eb20d9c7f4338dccf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666bef3536849d40719e32116845ad95.png)
(Ⅱ)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1f0c86b11b8801a342b89ed154b6a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ceeb5e02a8636d02cc02003a2e25cff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d7cf247825e5c053569c1a0c27967b.png)
(Ⅲ)在(Ⅱ)中,取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f0cf0c27c85a9e84b89a7fa2ba3be50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfbdc7536ae58152077d4d08d857b299.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85cbffd31f3bcdcd9931eb14666fbba.png)
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