解题方法
1 . 设直角坐标平面上两个区域为
,
,记
与
的公共部分面积为
.当
时,则
的表达式为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7b4d2af45f4af001a08d49d1161ee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c6d5db1f2427972e79de8f6eee18082.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2709ca478fb15ea08e8aa55328eae8e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23865ee52040331dee23621b4a15c244.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2709ca478fb15ea08e8aa55328eae8e6.png)
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解题方法
2 . 变量
,
满足约束条件
,则目标函数
的取值范围是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3c6311dce8854df90db7eba9fae14f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6bed816ad89b05757d372746aa7b6b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 不等式
对任意t均成立,则
表示的平面区域的面积为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62e08bc2049b01db02af62c07937050.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62e08bc2049b01db02af62c07937050.png)
A.2 | B.![]() | C.![]() | D.3 |
您最近一年使用:0次
解题方法
4 . 已知
,若方程
的根
和
满足
.
(1)在平面直角坐标系
中,画出点
所表示的区域,并说明理由;
(2)令
,求
的最大值与最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a2b59e7080503a1f7e9d99e7db8fd5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74457dc76d16897775a5021da7e3a3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9733d0dc09a6c9f7db3543ddb3f007b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/25/7b30e585-d1aa-4ea6-894c-834eb8cf45c7.png?resizew=168)
(1)在平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb6f70c26a40ac89ae3095b03dd2ba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63313f7ac7402fcb5a9a840db64c6f08.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd8f9a46150968652a080d12b316f543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad481cbfb67ac9cdbc0537f3de23b022.png)
您最近一年使用:0次
名校
5 . 已知实数
满足
,若
的最大值为
,最小值为
,则实数
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/122f7d46e51bec46e7eb5f3fc235ee92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baaa79c2c101deb8595d3b296ad2b73d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb4f22294f31a9a5cd246126b28493a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee343ed993012ac99860b11bb8cee933.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2020-01-11更新
|
195次组卷
|
5卷引用:2011年辽宁省瓦房店市五校高二上学期竞赛数学理卷
解题方法
6 . 已知点
的坐标满足
,则
的取值范围为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2201a1c70de39dd1607131bc55a1e794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcda62388ba3f9747413103bd48e1630.png)
您最近一年使用:0次
2016-12-04更新
|
1109次组卷
|
3卷引用:第十三届高一试题(B卷)-“枫叶新希望杯”全国数学大赛真题解析(高中版)
解题方法
7 . 已知三个正数
满足
,
,则
的最小值是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e96c5b872ee88717a128b03927d08f5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ef69d88e441e694aebbeef20b4996fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bed75007e8f90ae092c21be5737070d.png)
您最近一年使用:0次
2016-12-03更新
|
380次组卷
|
3卷引用:数学奥林匹克高中训练题_170