解题方法
1 . 下边的程序框图中,若输出
的值为29,那么程序框图中,判断框内应填写的条件是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/20/ee0c9e58-f802-46e2-8e7a-ce9b1a4b73d3.png?resizew=131)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 将
这16个正整数随机地填入
棋盘的16个格子中(每格填写一数),则使每行、每列填数之和皆为偶数的概率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a74ea6eb01f701a385cd1c1db36aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb9d60d456560e9bac66c8b20c49bb1.png)
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3 . 将“马”“上”“成”“功”这四个字填在一个5×5的方格表中,每个小方格内至多填1个字,“马”“上”始终按从左往右的顺序填写,“成”“功”也始终按从左往右的顺序填写,且“马”“上”必须在同一行或按从上往下的顺序在同一列,或者“成”“功”必须在同一行或按从上往下的顺序在同一列.则不同的填法种数为_______ (用数字作答).
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4 . 已知坐标平面内点
与直线
,动点
到点
的距离为
,到
的距离为
,若
,
(1)求
点轨迹方程并画出图形;
(2)过
作倾斜角为
的直线
,交轨迹
于
、
两点,设
,求
表达式及
为何值时,
取最大、最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d521c9bf37ce287bc559b016d79e1101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2977eea43a781e06d93e04a395a309.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e067be545a0178382625422a2e67621d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6f5b3fdab107f1dd9bc76e3cb078f3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345ad702b0a5784d867e1470c69c72fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345ad702b0a5784d867e1470c69c72fb.png)
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5 . 在竖直坐标平面
中,从坐标原点
出发以同一初速度
和不同的发射角(即发射方向与
轴正向之间的夹角)
射出的质点(不计质点的大小),在重力(设重力加速度为
)的作用下运动轨迹是抛物线,所有这些抛物线组成一个抛物线族(即抛物线的集合).若两条抛物线在同一个交点处的切线互相垂直,则称这个交点为正交点.证明:此抛物线族的所有正交点的集合是一段椭圆弧,并求出这个椭圆弧的方程(包括变量的取值范围),再画出它的草图.注. 抛物线
在其上的点
处的切线的斜率为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7795aec93c2c7ac2fd93e6747ca6516c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8f8c7e1d521ec2eb2c1f12835683701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8726427a7343bb24296d28f1179485ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/276509f01529d982ab21e479a4619268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa3a3fc366487b798363daeeb3643ac.png)
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6 . 已知一个
方格表.试求最小的正整数
,使得可以在方格表中画出
个矩形(其边在网格线上),且方格表中的每个小方格的边均包含在上述
个矩形之一的边上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a9c9fe28b5b61355a6d9dc95cda514.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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7 . 已知
,
,
,且
,
.试在平面直角坐标系中画出点
的区域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d974b528608983c55e85431a9135555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cab9d266b92cd2d75ee3c51b13e8d04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b74a05e3b377c987235de3717f667ff0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a09daeaa56cadadec7e06fca8125fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
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