名校
解题方法
1 . 已知
为平面区域
:
(
)内的整点(
,
均为整数的点)的个数,记
,数列
的前
项和为
,若对于
,
恒成立,则实数
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4fc8faefb26b233d4aa9dbef043aae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d72f2cbabcb955a433e99bf0ee8ec020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03d1ed1408f0dc1292f1d92a400aaa96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8d83b339538558627fec1760fa8aad9.png)
![](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/3557f60df2c58102f551a043291ece0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72620c113a6fe83273803a9ac24baa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d3bf61d3f677a5e817fe0e49dcd95e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
您最近一年使用:0次
真题
2 . 若不等式组
,表示的平面区域是一个三角形区域,则
的取值范围是
![](https://img.xkw.com/dksih/QBM/2014/7/24/1571827142049792/1571827147603968/STEM/5627699c77784ba0b4246d0f419c57bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() ![]() |
您最近一年使用:0次
2016-11-30更新
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1426次组卷
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4卷引用:2010年广西桂林中学高二上学期期中考试数学试卷
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