已知函数
,问是否存在实数
,使
在
上取得最大值3,最小值-29,若存在,求出a,b的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/185730b8bdc1a85b201074f93b482db0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23c33b69adc112831fa115b5dffdb616.png)
更新时间:2023-08-15 15:16:05
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【知识点】 已知函数最值求参数
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】已知函数
(
).
(1)当
时,求函数
在
上的最大值和最小值;
(2)当
时,是否存在正实数
,当
(
是自然对数底数)时,函数
的最小值是3,若存在,求出
的值;若不存在,说明理由;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a1372c2b92f29e489f2cdc74b81d880.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773ca22fc12ade9e60dbc749ba5cfa73.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f21e3e818fdbce08ff9001a86daec0b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b448fe164c2c2931805e3b3847dcdd75.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3980c52927f12c114f3b291ad714d778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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【推荐2】已知函数
.
Ⅰ
若
时,求函数
的单调区间;
Ⅱ
若
,则当
时,记
的最小值为M,
的最大值为N,判断M与N的大小关系,并写出判断过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78dd618bc3c5a61975e7b8c4856c6f35.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/26dd3ee1312239398bcd5bbbd3c404c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7028a5fa4d781d382ca3b73b74796e.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/460d86d81e829efc457b6735fbb47700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11a8340fafae567a82b5551c8fbe91cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24403a972680c2d61deb1a84eb7b5c23.png)
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解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐3】已知函数
,定义域为
,实数
,
(1)若
,求函数的极值点与极值;
(2)若函数
在区间
上的最大值为20,求实数a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662655ca9d5dc477a492c956c6f500c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3b2856045b940760ebabe6606df19a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9e6a220e85fa5a1d7c773bb143d46f.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/499a8449e8bb253065463c23f3ff5860.png)
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