解题方法
1 . 设
为不等式组
所表示的平面区域,
为不等式组
所表示的平面区域,其中
,在
内随机取一点
,记点
在
内的概率为
.
(1)若
,求
;
(2)求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369b3448daf9f55043c83f397ed227a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b99178f28034364a1acec18a401434.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a293d50fbdc99d65aa1d4666f9d38a8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/717e5ded053d801848a0041a49e73953.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解题方法
2 . 若变量x,y满足约束条件![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25d0f0da172fede4195241252e474978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
(1)画出不等式组表示的平面区域;
(2)求目标函数z=y+x的最大值和最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25d0f0da172fede4195241252e474978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
(1)画出不等式组表示的平面区域;
(2)求目标函数z=y+x的最大值和最小值.
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3 . 已知点集
表示的区域面积为
.
(1)求
的值;
(2)若正实数
,
满足
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a7f5f9d868c6093abbdf7104f715391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若正实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab04de6651256f6281e9f4c1dc3c7955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d761f9c345b0b8a7eb596d6b21b7a734.png)
您最近一年使用:0次
2021-11-15更新
|
79次组卷
|
2卷引用:河南省商丘市部分学校联考2021-2022学年高二上学期期中考试理科数学试题
解题方法
4 . 已知点集
表示的区域面积为
.
(1)求
的值;
(2)若正实数
,
满足
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a7f5f9d868c6093abbdf7104f715391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若正实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab04de6651256f6281e9f4c1dc3c7955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce460941cf3ff54ccb6aec5085689a91.png)
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5 . 如图,正方体
是一个棱长为2的空心蔬菜大棚,由8个钢结构(地面没有)组合搭建而成的,四个侧面及顶上均被可采光的薄膜覆盖,已知
为柱
上一点(不在点
、
处),
(
),菜农需要在地面正方形
内画出一条曲线
将菜地分隔为两个不同的区域来种植不同品种的蔬菜以加强管理,现已知点
为地面正方形
内的曲线
上任意一点,设
、
分别为在
点处观测
和
的仰角.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/91b53078-fca9-4f88-aa6f-95dfa0da9cdc.png?resizew=137)
(1)若
,请说明曲线
是何种曲线,为什么?
(2)若
为柱
的中点,且
时,请求出点
所在区域的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e12d2a6d79849ebf3015069e9a3770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d8047f0a8bd0cf4e250cd0fe80093b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/91b53078-fca9-4f88-aa6f-95dfa0da9cdc.png?resizew=137)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa3205b1df826d63914dcb55bb3ab43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90df641ab645927ee577e79faf18dcdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解题方法
6 . 已知
是以点
,
,
为顶点的三角形区域(包括边界及内部).
(1)写出表示区域
的不等式组;
(2)若目标函数
的最小值为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab47bf43b2c5d6395129b80ddfbb1b24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15389eb019d806846a5bb05860adfcb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b01e555bf9cbc0a88f92dbf05166add2.png)
(1)写出表示区域
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)若目标函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e464e8417b5e09a14b2d1bcd153712e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/461854f4147ad6dc6e0987238a6c6c99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
7 . 已知实数x,y满足
.
(1)
的取值范围;
(2)
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9acb78fa3cccf4cba58c34534296772.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f63a0d23ac4ead9b77545285cbd36e4.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de10c0694bdfd1130a1797a3cc7de46e.png)
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8 . 在平面直角坐标系
中,已知
,
,
.
(1)作出以
、
、
为顶点的三角形及其内部的平面区域(包括边界),并用关于
、
的不等式组表示该区域;
(2)若目标函数
仅在点
处取得最大值,写出满足题意的一组
、
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7086e04471893c3b8e7526692286511f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4218690b49de906a22dda72c578956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7e474ef30795f4e2f7259628ba5c61.png)
(1)作出以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)若目标函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f992bb01c2ec23384c6ae6432a64a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
2019-12-08更新
|
160次组卷
|
2卷引用:上海市复兴高级中学2017-2018学年高二上学期期中数学试题
9 . 已知x,y满足条件:
,求:
(1)
的最小值;
(2)
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/687979bee344211e1dccda6eeb9e35b3.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f36faea2e5482b764a536fdf5de5309.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88eb89b17bd485736808c2311bd5b10b.png)
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10 . 求
的最大值,使式中的x、y满足约束条件
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82f3ae657dc3db505cf1eb6fe84ce3e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb1e94f7aa469d10766b95f7d8ca0404.png)
您最近一年使用:0次
2018-12-21更新
|
291次组卷
|
2卷引用:甘肃省临夏中学2018-2019学年高二上学期期中考试数学试题