名校
解题方法
1 . 倾斜角为锐角的直线经过抛物线
的焦点
,且与
交于
,
两点,
为线段
的中点,
为
上一点,若
的最小值为8,则这条直线的斜率为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d160544ddb1498b294c1798399e881d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff21811ea84135ab28112ae687268f3.png)
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2 . 在
中,角
所对的边分别为
,若
成等差数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c5688323a324c9b1d08a9b43355f41f.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7af7c5df749c6fa9bbe87faa72c66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba1e7a657ed134e68efd159b606620f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba1e7a657ed134e68efd159b606620f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c5688323a324c9b1d08a9b43355f41f.png)
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名校
解题方法
3 . 若
的展开式中
项的系数是8,则实数
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4200742c5037c386b37f4007e27b4ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
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4 . 已知抛物线C:
,O为坐标原点,F为抛物线C的焦点,点A,B为抛物线上两点,且满足
,过原点O作
交AB于点D,若点D的坐标为
,则抛物线C的方程为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cee097d4fe948c3d4f1b5c28b24adf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80991c1f0c963104740e50cfff6f29a8.png)
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名校
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5 . 某市选拔2个管理型教师和4个教学型教师下乡支教,要把这6个老师分配到3个学校,要求每个学校安排2名教师,且2个管理型教师不安排在同一个学校,则不同的分配方案的种数是__________ .(要求填写具体数字)
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名校
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6 . 现有一个底面圆半径为3的圆柱型的盒子,小明现在找到一些半径为3的小球,往盒子中不断地放入小球,若此盒子最多只能装下6个这样的小球(盒子的盖子能封上),那么圆柱盒子的容积与一个小球的体积的比值范围为____________ .
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解题方法
7 . 已知
的内角
,
,
的对边分别为
,
,
,设
,
,则角
等于____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a29c75b47d45da71d29652acdad73ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a77a0ce91016ca634fa684b8146be3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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8 . 若数列
是等差数列,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
________ ,数列
的前
项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7978d7bd6f6caf9ac9837ffce5f89654.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fdab475bd7621455a812218353f0d12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07970da4aa6afeb451a124e93f3de607.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7f98d49a9c29141100627594f1b8a22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7978d7bd6f6caf9ac9837ffce5f89654.png)
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9 . 设随机变量
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
_________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b060ce5275f54932abc24547f579c1af.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/949d821ae0182847678c7d7addfe9d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f72e21fb676122148ea985159a007358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b060ce5275f54932abc24547f579c1af.png)
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解题方法
10 . 公比为
的等比数列
的前
项和
,若
,记数列
的前
项和为
,若
恒成立.则
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.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/5b75dbb20178da2eec9ff11a9c74e841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e764296a62a7def78e39370f746b4663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba0ec7be618f2c0ad1e154d65cc9b54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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