名校
1 . 已知实数
满足约束条件:
,若
只在点
处取得最小值,则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345e42ccb1403a78c5ea8fdcf836f4aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f2f54897ba501b74846ac6c84b919ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/238f0ea276a00ae8d681ce00cc11c8ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
2 . 若
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fafe1614aacaa4a19122bfec3343d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 已知点
,
是坐标原点,点
的坐标满足:
,设
,若
的最大值是4,则
的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d295a4cc3a58f9f38ee98337313c81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd3f4427efd48749d93f98c90aa7573.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bd1fcccc0a3e8da16374e84739d2a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.4 | B.3 | C.2 | D.1 |
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4 . 在区域
:
内任取-点
,使得
成立的概率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28f642f9e7ce0bd0bb9ded01a22aa21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827539d066d1b78e7ef8bc1569864971.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29afaebdd75895144069a51494d09695.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 若实数
满足
,如果目标函数
的最大值为3,则实数
的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c267b3e040514bab2ace1c21ab9c39a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee51b0cac927e6445e4b94438c2ff3da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.1 | B.2 | C.3 | D.4 |
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6 . 已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3db6cd399f58244a427f6a159b0a7f88.png)
,若
,且使
的最大值为
,(
,
),则
的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3db6cd399f58244a427f6a159b0a7f88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec480c4d4daa83283d3f202c81d1dec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c30f84f064713136b1145598d6573de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e0965b7c541af06c9d65adfda1c833c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd71c19eb1c96d7a259b5a51d657605a.png)
A.4 | B.2 | C.![]() | D.![]() |
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名校
7 . 若x,y满足约束条件
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddfaa16aa60bdfc5c84023d9f3167fc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/609cf257e39a12225a0cf28582b8da58.png)
您最近一年使用:0次
2019-03-31更新
|
556次组卷
|
6卷引用:2020届湖南省怀化市高三下学期4月第一次模拟考试文科数学试题
2019·全国·一模
名校
8 . 已知实数
,
满足
,则
的取值范围为____________ .
![](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/ea0cd0b202dcb18f03b4aebfb59e57c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52e5b144c9476675d0db21263104a99b.png)
您最近一年使用:0次
2019-03-26更新
|
773次组卷
|
3卷引用:2020届湖南省常德市高三第二次高考模拟考试数学(文)试题
2020届湖南省常德市高三第二次高考模拟考试数学(文)试题(已下线)2019年3月2019届高三第一次全国大联考(新课标Ⅱ卷)理科数学试题2019届湖北省黄冈中学高三下学期5月第二次模拟考试数学(理)试题
名校
9 . 已知
,给出下列四个命题:
:
,
;
:
,
;
:
,
;
:
,
;其中真命题是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d52d101d543a800f9e06f22043a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/449a0863faaef6d7994846ca8fdea876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f94745850a9fa4d8c628c7100b8be2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/449a0863faaef6d7994846ca8fdea876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4edafb54e8fc9cf28e41c7b648007ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c85e0f105ae5ded7ccafe91398d8ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a893bca748d72e92b606f9acb1c0d1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee50575e3ebd56c4f46dd0bbf8e55d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c85e0f105ae5ded7ccafe91398d8ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac624f921a4282e16b160384c47414d0.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2019-03-26更新
|
317次组卷
|
2卷引用:湖南师大附中2019届高三月考试题(七) 数学(理)
10 . 变量
、
满足
,设
,则
的最大值为__________ .
![](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/5eb5d33fa535bb2ddd3d971b26672dbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929a32a65992dd03fb336a5bd088e2c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
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