在2024年元旦即将到来之际,学校准备开展“冬日情暖,喜迎元旦”活动,小星同学对会场进行装饰.如图1所示,他在会场的两墙
、
之间悬挂一条近似抛物线
的彩带,如图2所示,已知墙
与
等高,且
、
之间的水平距离
为8米.
,
的高度是 米,抛物线的顶点坐标为 ;
(2)为了使彩带的造型美观,小星把彩带从点
处用一根细线吊在天花板上,如图3所示,使得点
到墙
距离为3米,使抛物线
的最低点距墙
的距离为2米,离地面2米,求点
到地面的距离;
(3)为了尽量避免人的头部接触到彩带,小星现将
到地面的距离提升为3米,通过适当调整
的位置,使抛物线
对应的二次函数的二次项系数始终为
,若设点
距墙
的距离为
米,抛物线
的最低点到地面的距离为
米,探究
与
的关系式,当
时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372ad1814216fb7ebe39a0e067cf70be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)为了使彩带的造型美观,小星把彩带从点
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)为了尽量避免人的头部接触到彩带,小星现将
![](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/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ffd5c35bba71ea54c28622b6cf505d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef06a3c4befc30945469d55bea138bb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2023-11-18 14:53:43
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】抛物线
过点A(-3,0),点B(1,0)与y轴交于点C,顶点为D,点E在y轴负半轴上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/1744598c-1e4e-4456-8e11-de486b0dea23.png?resizew=495)
(1)求抛物线的表达式及点D的坐标;
(2)若△ADE是直角三角形,求点E的坐标;
(3)点P是抛物线在第一象限内的点,连接AP交y轴于点H,连接AE交抛物线于点F,点G在线段OA上,且AG=CE,连接GH,若∠EAO=2∠OGH,
,求点F的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/1744598c-1e4e-4456-8e11-de486b0dea23.png?resizew=495)
(1)求抛物线的表达式及点D的坐标;
(2)若△ADE是直角三角形,求点E的坐标;
(3)点P是抛物线在第一象限内的点,连接AP交y轴于点H,连接AE交抛物线于点F,点G在线段OA上,且AG=CE,连接GH,若∠EAO=2∠OGH,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fecc5d0bb174c38e8d6e7a73eeb1d11b.png)
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【推荐2】已知抛物线顶点
在
轴负半轴上,与
轴交于点
,
,
为等腰直角三角形.
(1)求抛物线的解析式
(2)若点
在抛物线上,若
为直角三角形,求点
的坐标
(3)已知直线
过点
,交抛物线于点
、
,过
作
轴,交抛物线于点
,求证:直线
经过一个定点,并求定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a9b5996067a3fc9adcf0ca178dddf03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8189f7b0ffe4d20bf0fad43b4ed589.png)
(1)求抛物线的解析式
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(3)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8374b5490fb6f8837a2e25cec1651ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba74dcac003b7bb339eff25745a499f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/2019/10/21/2316720279207936/2317292140085248/STEM/a97745382eac4065a5c4f011d50af429.png?resizew=123)
![](https://img.xkw.com/dksih/QBM/2019/10/21/2316720279207936/2317292140085248/STEM/e704b15ca884414ea2daeae42331b844.png?resizew=122)
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【推荐3】如图,在平面直角坐标系中,抛物线
上有两点A、B,其中点A的横坐标为
,点B的横坐标为1,抛物线
过点A、B.过A作
轴交抛物线
另一点为点C.以
、
长为边向上构造矩形
.
的解析式;
(2)将矩形
向左平移m个单位,向下平移n个单位得到矩形
,点C的对应点
落在抛物线
上.
①求n关于m的函数关系式,并直接写出自变量m的取值范围;
②直线
交抛物线
于点P,交抛物线
于点Q.当点
为线段
的中点时,求m的值;
③抛物线
与边
、
分别相交于点M、N,点M、N在抛物线
的对称轴同侧,当
时,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6990c7d045c0d4a1046819189f4374b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d3aebefdf1c512314bac1257f504736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d51fa2414dbedc6b24777b28a796c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c93148adbc6e856da9a9d263f485d003.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)将矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/572f19c8c1f5130b974e0ee8364244ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
①求n关于m的函数关系式,并直接写出自变量m的取值范围;
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e470610434d0fd21efd9d23801c32b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b1a5427d8ff23df0f3ec194756c84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
③抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d180757791d575e304cf7faf36261ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfad1ba71a78d8f415335cde2f8c52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edba6c9aebd8ecdf9fd9ba6fc4302c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
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【推荐1】如图,已知二次函数
的图象经过点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/2f066c9b-1aab-447f-b710-1cfc875ee9bd.png?resizew=236)
(1)求a的值和图象的顶点坐标.
(2)点
在该二次函数图象上.
①当
时,求m的值.
②当
时,该二次函数有最小值11,请直接写出m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40260eaf6a0bd21eb8a47b9dbc417937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c0de4311ea1460429f177f71643fc19.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/2f066c9b-1aab-447f-b710-1cfc875ee9bd.png?resizew=236)
(1)求a的值和图象的顶点坐标.
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/005f97358b620c0e9f96aff7a18b2a4f.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b1672953164c806fee8e7d6d8336c8.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2198978baa5a994212ecd40c2a6ad351.png)
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【推荐2】已知二次函数
,
的最小值为0;
.当
时有
;且对于任意实数
,
.
(1)
的对称轴为_________,顶点坐标为_____________;
(2)当
时,求
的值;
(3)令
,试求实数
,使得实数
最大,当
时
成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a136e66226fbf6673b7be9832eee7268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a05352934810ceaa503c8ce97c9c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df86b0da538701c08fb214608e062372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5121b6dc7e5ed859689aedff58847f91.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9e33a2da39f34be6c2c514c776fb229.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bbed272c4fb1c074208cf09ed9b158f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c74d7ab7f6bbbd6a3c71b7806bcf01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c36efdb203580ca8aaa053bfa5315180.png)
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【推荐1】如图,在平面直角坐标系中,二次函数
的图像与x轴交于A,B两点(A在B的左侧),与y轴交于点C,且A坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/8c362f36-89bf-4c4b-ab17-931c866b5405.png?resizew=165)
(1)求抛物线的对称轴及点B的坐标;
(2)连接BC,若点A到直线BC的距离AM为
,求抛物线的解析式;
(3)在(2)的条件下,点P在x轴上从点B出发以每秒1个单位速度向左移动,同时作
于点Q,再将
绕点P顺时针旋转
,得
(点B对应点
,点Q对应点
).设移动时间为t秒,当点
落在抛物线上时,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c7a6585c4521bcf5bbab45c4fed1cba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6554ac3dff4a59833e407db887f6e6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/8c362f36-89bf-4c4b-ab17-931c866b5405.png?resizew=165)
(1)求抛物线的对称轴及点B的坐标;
(2)连接BC,若点A到直线BC的距离AM为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
(3)在(2)的条件下,点P在x轴上从点B出发以每秒1个单位速度向左移动,同时作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/902f24325565a9dd95128a633a240da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c495b8fd7f7bb21c177c9d50fbf6919.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdade5d0936ad4f66cd44f44bd278b48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42da28be159399514cc6179a96e34b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42da28be159399514cc6179a96e34b.png)
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【推荐2】二次函数
的图象与x轴分别交于点A,B(点A在点B的左边),与y轴交于点C.点D是二次函数在第一象限图象上的一动点,过点D作
轴,交二次函数图象于另一点E.作点D关于y轴的对称点P.
(1)求
的长;
(2)若
是边长为1的等边三角形,求二次函数的解析式;
(3)求
的值的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5110a9dbbcfd3a3255f7bf514b2f7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99673415af51dedd6f4e9f8d71dee849.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96645a3530e72d5d733d2c72147d340.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/239c6827cb2a9f8331def0dde63254b8.png)
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【推荐1】如图,在
中,
,
,
,动点
从点
出发,沿折线
向点
运动,点
在
上的速度为每秒1个单位长度,在
上的速度为每秒
个单位长度,过点
作
交折线
于点
,以点
为旋转点,将线段
绕点
顺时针旋转
得到线段
,连接
.当
与
重叠部分图形是三角形时,设三角形的面积为
(平方单位),点
的运动时间为
(秒).
(1)当
时,求
的长.
(2)求
关于
的函数解析式.
(3)当
与
重叠部分图形是轴对称图形时,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d768ffd5bf75080e8ff5ce6b472c0cc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d35d8d8bb0dc17f2f86fe5b230a2b8.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/778cdfe7346279f9695a745fb780e806.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fb30a9d07e410ac92c34b8ad0133db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92f602a637e57761b115810931ae8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/1/de4e58b9-da32-4b7c-9a86-a5b5b8572820.png?resizew=170)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐2】已知:如图,在矩形ABCD中,AB=6cm,BC=8cm,对角线AC,BD交于点0.点P从点A出发,沿方向匀速运动,速度为1cm/s;同时,点Q从点D出发,沿DC方向匀速运动,速度为1cm/s;当一个点停止运动时,另一个点也停止运动.连接PO并延长,交BC于点E,过点Q作QF∥AC,交BD于点F.设运动时间为t(s)(0<t<6),解答下列问题:
![](https://img.xkw.com/dksih/QBM/2018/7/15/1988821462253568/1989715967082496/STEM/fd9fb0e27bba4583b357437e4b066d72.png?resizew=162)
(1)当t为何值时,△AOP是等腰三角形?
(2)设五边形OECQF的面积为S(cm2),试确定S与t的函数关系式;
(3)在运动过程中,是否存在某一时刻t,使S五边形S五边形OECQF:S△ACD=9:16?若存在,求出t的值;若不存在,请说明理由;
(4)在运动过程中,是否存在某一时刻t,使OD平分∠COP?若存在,求出t的值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2018/7/15/1988821462253568/1989715967082496/STEM/fd9fb0e27bba4583b357437e4b066d72.png?resizew=162)
(1)当t为何值时,△AOP是等腰三角形?
(2)设五边形OECQF的面积为S(cm2),试确定S与t的函数关系式;
(3)在运动过程中,是否存在某一时刻t,使S五边形S五边形OECQF:S△ACD=9:16?若存在,求出t的值;若不存在,请说明理由;
(4)在运动过程中,是否存在某一时刻t,使OD平分∠COP?若存在,求出t的值;若不存在,请说明理由.
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐3】如图1,对于平面上不大于
的
,我们给出如下定义:若点P在
的内部或边界上,作
于点E.
于点
,则称
为点P相对于
的“优点距离”,记为
;
如图2,在平面直角坐标系
中,对于
,点P为第一象限内或两条坐标轴正半轴上的动点,且满足
,点P运动形成的图形记为图形G.
(1)满足条件的其中一个点P的坐标是 __,图形G与坐标轴围成图形的面积等于 __ ;
(2)设图形G与x轴的公共点为点A,如图3,已知
,
,求
的值;
(3)如果抛物线
经过(2)中的A,B两点,点Q在A,B两点之间的物线上(点Q可与A,B两点重合),求当
取最大值时,点Q 的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ba22238cdff318a4bd9d4d746b3229.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/051fcebdefb182073ebaa2ab2ad8159a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66075024f60fca9be9338c053032a997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bce17597a7a6a83cd4287d424db6b56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38965fcc0c591d7dc1d639f8a8193706.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/18/d077eea6-95f1-4549-a786-c0a23194e207.png?resizew=672)
如图2,在平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e080cd6923aa79d1226e1f48062b936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4a1ec95bde3cf988938603cbd3fa84d.png)
(1)满足条件的其中一个点P的坐标是 __,图形G与坐标轴围成图形的面积等于 __ ;
(2)设图形G与x轴的公共点为点A,如图3,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/232f941eb8c4345cf49137746a2461b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ba9d9535a1d7e34f66db9da0861394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e71358c7bf4b1525469e1b2cd59c30.png)
(3)如果抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c9800e4b992044d16681e77ff6563c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6458b1e0328c094d3b9f3b1bc68e36f1.png)
您最近一年使用:0次