1 . 设正六边形ABCDEF的边长为1,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c7645b72bec35c46321be83fbb90b2.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c7645b72bec35c46321be83fbb90b2.png)
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2 . 双曲线
的右焦点为F,离心率为e,过点F且倾斜角为
的直线与该双曲线交于点A、B,若AB的中点为M,且|FM|等于半焦距,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ce2b47812fce4b17fd813d0e4cce21.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ce2b47812fce4b17fd813d0e4cce21.png)
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3 . 满足(a+bi)6=a-bi(其中a,b∈R,i2=-1)的有序数组(a,b)的组数是_____ .
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4 . 异面直线
、
分别在平面
、
内,若
,则直线
必定是( )
![](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/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40b707f5ee4fbb2e637c65fbc6d8ed03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
A.分别与![]() ![]() | B.与![]() ![]() |
C.至少与![]() ![]() | D.至多与![]() ![]() |
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2020-02-05更新
|
614次组卷
|
7卷引用:1989年四川省高中数学联合竞赛试题
5 . 对任意正整数
,定义
为使得
是
的倍数的最小正整数
.关于下列三个命题:
①若
为奇质数,则
;
②对任意正整数
,都有
;
③对任意正整数
,都有
.
其中所有真命题的序号为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f378b8bfaacc38d98321122c1ed7c927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42753ada77daee9f575ad735e05462c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/626674c321964b32bb6d31f8d712a1d3.png)
②对任意正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fec80a250e8f692c8322aa4e2773235.png)
③对任意正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a0cff970343dbc4fdf533643c42db6.png)
其中所有真命题的序号为( ).
A.①② | B.①③ | C.②③ | D.①②③ |
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6 . 设动点
到点
的距离与到直线
的距离之比为2,则
的轨迹方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d259822ab64b8626f3893b8432673358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14436636ec6a7aec09cb63cecf6e970d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d259822ab64b8626f3893b8432673358.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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7 . 若一圆台的上底周长为4,下底周长为9,平行于底的截面周长是上、下底周长的比例中项,则这个截面分圆台的高所成的两段的比为______ .
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8 . 已知:
.求证:
(1)若
,且
,则 ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b8f6bf5c2f04c84550957271c5cb115.png)
(2)当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17e3231e8d07e6f17cca273949d2bbc.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb7961cbe98aac6a5fdee94582c341b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f364bd19eda02fa19a278441b2aa401b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b8f6bf5c2f04c84550957271c5cb115.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e468312d09c6563c9094b710a35a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eadd42e1f5910bcf2080d46d60db4f91.png)
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9 .
的充要条件是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44260a59379151d49445717cb6d19b0.png)
A.![]() | B.![]() ![]() |
C.![]() | D.![]() ![]() |
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10 . 已知数列
满足
,
满足
.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd82633c81468682e43a48c4de02904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2448cf72af76b810310e4cfb9818e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50b25e60fe7b3d370e480fba715eb47c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b8f281985adbb0bf5d8c37816336a2.png)
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