1 . 已知
、
和
都是关于
的二次三项式.请你证明:方程
不能有根1,2,3,4,5,6,7,8.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32fab7c272a9245acc3651504913c3db.png)
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2 . 点集
中元素的个数为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1758d2eca53b4e5c57a55ce1b6b8befa.png)
A.0. | B.1. | C.2. | D.多于2. |
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3 . 定义区间
的长度均为
.已知实数
.则满足
的
构成的区间的长度之和为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d9128eea388668d5a9652afc8c5e7fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9de374592100c57865a606a2d21ece9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa0653197cd4a5e31febc2173404ce2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.1 | B.![]() | C.![]() | D.2 |
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4 . 设
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e6aeb6e3fb0cca7914d213834f4b81d.png)
.则满足条件的所有实数a的取值范围为____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89a2d7c67748749a033294d20ec56360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e6aeb6e3fb0cca7914d213834f4b81d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b8e55a04c453597afecaefd77be2e81.png)
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2018-12-22更新
|
219次组卷
|
3卷引用:2008年全国高中数学联赛吉林赛区预赛试题
5 . 对给定的正整数
,如果存在整数
,使
.求所有的正偶数
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ebc31e6250d8e69a655e5afeecac5ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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6 . 若函数
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9892fa6880425786538beec4e7362272.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a4999eba0c510bbc31865f9939253a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9892fa6880425786538beec4e7362272.png)
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7 . 已知
为定义在实数集
上的函数,对任意的
、
,恒有
.求
,并计算
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54dad48527a47eab4a5916ab0421cc71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9423225dee4717741ceba039198dd6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba50b0de429edbfc86a9d72ba968bf91.png)
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8 . 已知
,
.求证:对一切
,
,…,
,均有
,等号当且仅当
时成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be466586da8810ccfd811c59a747adb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf10e7b0809be29347785970158557fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a774356dc406f4f2c2b5295a65bee96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e60c52127beaf19b211d27e3373192c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2697ef67790838c84cc238a0334c5d47.png)
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9 . 已知集合
.当
取遍集合
中的所有元素时,点
到原点
的最大距离是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/510c341cdbfa59854620893ae259d583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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10 . 已知
、
、
.试确定
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0cbd5debe225c68b2b0670d2ac2006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9492365416941862b9544761eccef063.png)
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