解题方法
1 . 已知实数
满足
,
,则
的取值范围为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f83aa36dd016d1cf2dab60cf365a2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d054fccc8df985eeb54fd5c8f950e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a5625448c60fd2640c13c5f6b4238b2.png)
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解题方法
2 . 上海世博会某国要建一座八边形的展馆区,它的主体造型的平面图是由两个相同的矩形ABCD和EFGH构成的面积为200m2的十字型地域,计划在正方形MNPQ上建一座“观景花坛”,造价为4200元/ m2,在四个相同的矩形上(图中阴影部分)铺花岗岩地坪,造价为210元/ m2,再在四个空角(如
等)上铺草坪,造价为80元/ m2.设AD长为x m,DQ长为y m.
(1)写出
与
满足的等量关系式;
(2)设总造价为
元,求当
为何值时,
最小?并求出这个最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69e70ac2a2eb20a7184cb1b80db8ee1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/31/fb2049fa-ee5a-4ead-8aee-a207426b3e2e.png?resizew=138)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)设总造价为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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3 . 设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e854137109ca321a377795247aa6cfad.png)
(1)当
时,求
的最小值;
(2)若对
,都有
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e854137109ca321a377795247aa6cfad.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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4 . 已知函数
,
,且
.记
为
在
上的最大值,则
的最大值是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1bd0587f5d6a3b5db9e4a93e0dbc0ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c0e9d1ad9561d693958756ee8398218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd7e2f553aab2a538cd4c5aa7857c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df6bc6bf086ae0da5fbbde88c93d0dee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e11f4ca0e7ace69f92130d0525bcdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc72c9e61139da71b2ddff6475c7706.png)
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2016-12-03更新
|
387次组卷
|
3卷引用:2016届浙江省嘉兴市一中高三上学期能力测试理科数学试卷
5 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d0ff37c07f786d0694d9101add60a12.png)
(Ⅰ)当
时,求使
成立的
的值;
(Ⅱ)当
,求函数
在
上的最大值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d0ff37c07f786d0694d9101add60a12.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e44284cb19805a584880a686ac3df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8175d4231e627c94ceb688a927e63c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0eac2b31a19918895e5af2d316490e7.png)
您最近一年使用:0次
2016-12-03更新
|
591次组卷
|
2卷引用:2015届浙江省桐乡一中高三下学期联盟学校高考仿真测试理科数学试卷