1 . 设地球和太阳的半径分别为
和
,地球和太阳的质量分别为
和
.已知
.则太阳的平均密度与地球的平均密度的比值为______ (精确到0.001).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06f7d06f746cc8d03d54e02c888abc7c.png)
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2 . 如图,已知抛物线
,
是过焦点
的弦.如果
与
轴所成的角为
,求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/994c0cb1e435532f108c00d28f2437a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60015ee538906996f588e2de81e9694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/07f1d377-114c-420d-b964-24d20c95b377.png?resizew=129)
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3 . 求满足如下条件的最小正整数
:在
的圆周上任取
个点
,则在
个
中,至少有2007个不超过
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79434650eeae04e51a441828b16fc994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35fc43aae6dccc82592a275a714889e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28ecb14717f870232da6aa72e7d5093b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c31a46b9780b063b83f65d68e4671b.png)
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4 . 已知关于
的方程
有3个正实根.求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e0c5454a977ee88795713f9edc8f13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa267124a127de2a996fecb732b4da0b.png)
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5 . 对任意正整数
,用
表示满足不定方程
的正整数对
的个数(例如,满足
的正整数对有(6,3),(4,4),(3,6)三个,则
).求出使得
的所有正整数
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25604acf458df2246bcd741388e5e8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c2ea64148ebc3f3aaa5fb14b1c115b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc6ec87f65120c30a860f55f50a34110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c645e4f08d725e170672435979415467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c558704f543ec2eac01d3299567cc698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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6 . 已知
,过
轴上的点
存在
的割线
,使得
.则点
的横坐标
的取值范围是___________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8c06b1382319577db765146d33d3460.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fe4b59c2f40deafebe46420af82cf03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0cbbcc3d79bf999588882e7b1b4324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6ec382b9d66e43e7fa8f75eccb0d3bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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7 . 已知数列
满足
,则数列
的通项公式
=__________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13cc6ee16611c072a73e688c8d5cb77e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
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8 . 已知
,计算:
=___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e056b86667a134fc5a82fbdf79ef0303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3604d0c6913e0cf79ab81e8f83aff6cc.png)
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9 . 已知
是大小为
的二面角,
为二面角内一定点,且到半平面
、
的距离分别为
、6,
、
分别是半平面
、
内的动点.则
周长的最小值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754bbd99327195520a4ca3ce3b9a0577.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/cf298f00799cbf34b4db26f5f63af92f.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/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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10 . 已知平面直角坐标系中点与点的对应法则
.若一段曲线在对应法则
下对应椭圆的一段弧
,则这段曲线的方程是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1376b8152e8081bf7babebac3497d57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4ff0af96ea467337cb30c4c765b5f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a3958d3705e20b8b050f58ce8e669f6.png)
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