1 . 设整数
,
是平面直角坐标系
中的点,其中
记
为满足
的点
的个数,则
=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5818ede14d21f6df9ef9c2bfe09286c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827539d066d1b78e7ef8bc1569864971.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/977415416c490a6731b7a192da89841d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd123757995db2e770e7832e1e5bf6d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
2 . 已知锐角
满足
,
且O为
的外接圆圆心,若
,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998329f9cdb86f5d60d7d5d70fc3781e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8d53f6d504fbd7e84bd250d9cc819b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b41a384997b1c3a570b2eeb61aea30a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
3 . 已知变量
,
满足约束条件
,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/8f8f5af07c75f94d0a823751bc31b040.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ee4ff51bc02334212b87e608870469b.png)
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4 . 若实数x,y满足条件
,则
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf0133ae23839ad9b0a05d9e0dd703c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c81b5f818af5d7f3dbd8f557599580d1.png)
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2020-02-18更新
|
255次组卷
|
4卷引用:江苏省无锡市宜兴市官林中学2020届高三下学期开学考试数学试题
解题方法
5 . 已知实数
,
满足
,则
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/e4f35716b217b79153e4f08a48891dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd473b270c2d991323ad5de5ff94a279.png)
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6 . 已知
是坐标原点,点
,若点
为平面区域
上的一个动点,则
的取值范围是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8129b7aab82db77ae4c6ee9c200272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d259822ab64b8626f3893b8432673358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acdb875ada0ac9eecf94bc6d04409ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a8155db63bad2d1a9200e1beef40f22.png)
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7 . 已知实数
满足约束条件
,则目标函数
的取值范围为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3c6311dce8854df90db7eba9fae14f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a311167ece8f398964da7e13c3a8a278.png)
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2017-12-26更新
|
441次组卷
|
5卷引用:江苏省南京市六校联合体2019-2020学年高三上学期期初数学试题
8 . 抛物线
在
处的切线与两坐标轴围成的三角形区域为
(包含三角形内部和边界).若点
是区域
内任意一点,则
的取值范围是____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cf99adccc80f28343fedd8d0aad7429.png)
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2019-01-30更新
|
1582次组卷
|
4卷引用:2019届江苏省无锡市第一中学高三下学期2月期初考试数学试题
名校
9 . 已知点
满足
,则
的最大值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f182a3ea2df6ad08c7b114c4a2836c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9faa5bb38047a22b66a7b6942a01d0ff.png)
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10 . 已知
,若存在实数
满足
,
,则
的最大值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc1e635b31d9f14e0701ee507be0b797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69694028598b9a0896f3df7ff2949ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/138bdf0c157b70319b2f2d67914b392f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c6ce02259a85ea191541f4a708738f1.png)
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