1 . 设不等式组
所表示的平面区域为
,记
内的整点个数为
,(整点即横、纵坐标均为整数的点)
(1)计算
的值;
(2)求数列
的通项公式
;
(3)记数列
的前
项和为
,且
,若对于一切的正整数
,总有
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cc8c4388452ab64b54db55bffa7352b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/163e5879f61fdb6bc8771455f40fcbdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/163e5879f61fdb6bc8771455f40fcbdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d064196f38b30602e2c37475c1b59d16.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e811319298c688d1264a792699a5d35.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bfccafa83afe5ee21eab6ef2b2c8852.png)
(3)记数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d133c4c47f9746b8d0bee0d24e10f6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da0f1349bbb967b5b1b1cd13288efaca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
2 . 已知在椭圆方程
中,参数
都通过随机程序在区间
上随机选取,其中
,则椭圆的离心率在
之内的概率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91f1f6f6b9b68e2cff708ae0573f5c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180735d52856f4393e40e28e7fcc95bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/091b43a8abc57a695a37c2884845c6d6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-06-05更新
|
1265次组卷
|
3卷引用:湖南省衡阳市第八中学2017-2018学年高二上学期期末考试数学(理)试题
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3 . 在平面直角坐标系中,不等式组
(r为常数)表示的平面区域的面积为π,若x,y满足上述约束条件,则z=
的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a31bcfa58abae91c5aa25ce610d4952.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4dfd5ab2ed7b1d21effae72819dfaeb.png)
A.-1 | B.-![]() |
C.![]() | D.-![]() |
您最近一年使用:0次
2017-03-17更新
|
2826次组卷
|
8卷引用:【全国百强校】湖南省衡阳市第八中学2017-2018学年高二下学期期末结业考试数学(理)试题