第3章不等式
3.3二元一次不等式组及简单线性规划问题(重点练)
一、选择题:在每小题给出的四个选项中,只有一项是符合题目要求的.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c180651d2c4153b80e2a5dab5c4bd20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5538ae331dc6c48fe526ee010f3a661.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 求分式型目标函数的最值解读 对勾函数求最值解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f3e481e76b38cb7c6e367be2d754ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baaa79c2c101deb8595d3b296ad2b73d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/140f5dd2220fdad402e09045b2b59647.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83666674f1111c699d7c5f7b792e0285.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 根据最优解或最值求参数解读
二、填空题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434991855f5b45cd3835a961eecaea30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99f46d04ca400602ba94d3b68e10fa03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4891ace2f5ae6578d2741199fd6fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede280b7d4529ca9afb08bff174225ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
【知识点】 根据点与直线(可行域)的位置关系求参数解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6ff81aedbefa935da289dc632e78eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d03fa28c117649b0fdfe17eed7b583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24dba5cc987db7f50f9b8e2d4544006d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cd5376a5a553df6bb006bed362d3ac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
【知识点】 由可行域确定不等式(组)解读 根据最优解或最值求参数解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0a27de8b83390fe51337b758070687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9b8316faaf2f8d8ca6dc39c56b7553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df2ae3a092acc4ed595dea31ea66bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42b6abf0d716fc2c59e1ea2476286ec.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df2ae3a092acc4ed595dea31ea66bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42b6abf0d716fc2c59e1ea2476286ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/258e40e3883271c3580c1d3c805dcac6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df2ae3a092acc4ed595dea31ea66bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42b6abf0d716fc2c59e1ea2476286ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5972757ec4394b8e6e5fdd201884497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5972757ec4394b8e6e5fdd201884497.png)
【知识点】 画(判断)不等式(组)表示的可行域解读 求可行域的面积解读
三、解答题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39db87b5985701f8258b68ef2b495e8.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9faa5bb38047a22b66a7b6942a01d0ff.png)
(2)设z=x2+y2+6x﹣4y+13,求z的取值范围.
【知识点】 求平方和型目标函数的最值解读 求分式型目标函数的最值解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/916bb2cc1b29574ff95b47567c59ee0c.png)
【知识点】 斜率公式的应用 直线与线段的相交关系求斜率范围
(1)求证:|c|≤1.
(2)求证:当﹣1≤x≤1时,|g(x)|≤2.
产品A(件) | 产品B(件) | ||
研制成本与塔载 费用之和(万元/件) | 20 | 30 | 计划最大资 金额300万元 |
产品重量(千克/件) | 10 | 5 | 最大搭载 重量110千克 |
预计收益(万元/件) | 80 | 60 |
试问:如何安排这两种产品的件数进行搭载,才能使总预计收益达到最大,最大收益是多少?