如图,
中,
,
于点D,
,
,点E从点A出发,以
的速度沿
向终点C运动,过点E作
与边
相交于点F(点F不与点C重合),与
相交于点G,设点E的运动时间为t(单位:s),
的面积为S(单位:
).
,
的长;
(2)求S关于t的函数解析式,并直接写出自变量t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f5a152f235942d11c74ef518fca7bba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a72106819c0f2bded80a9a6babfd5444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ba95116dc790b935d65bf540799cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/574cb9cf21957ecd10ca9bc36a1b0451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a24ee04b7e461c045431ce83d15a91de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/857e774989e5b67df5929d0f0634618e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e31351d7b971bda5c97c662fc71103a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)求S关于t的函数解析式,并直接写出自变量t的取值范围.
更新时间:2024-03-15 23:52:13
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图,在
中,∠B=90°,AB=8米,BC=10米,动点P从点A开始沿边AB向B以1米/秒的速度运动(不与点B重合),动点Q从点B开始沿BC向C以2米/秒的速度运动(不与点C重合),如果P,Q分别从A,B同时出发,设运动时间为x秒,
的面积为y平方米
(1)填空:BQ= 米,BP= 米(用含x的代数式表示)
(2)求y与x之间的函数关系式,并求出当x为多少时y有最大值,最大值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
(1)填空:BQ= 米,BP= 米(用含x的代数式表示)
(2)求y与x之间的函数关系式,并求出当x为多少时y有最大值,最大值是多少?
![](https://img.xkw.com/dksih/QBM/2021/1/8/2631876913700864/2633372310233088/STEM/a52bde0d1b4d42df9347cb5de4a0940f.png?resizew=162)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在四边形ABCD中,AD∥BC,∠B=90°,射线ED⊥BC于点E,AD=AB=BE=
BC=4,动点P从点E出发,沿射线ED以每秒2个单位长度的速度运动,以PE为对角线作正方形PMEN,设运动时间为t秒,正方形PMEN与四边形ABCD重叠部分面积为S.
(1)当点N落在边DC上时,求t的值.
(2)求S与t的函数关系式.
(3)当正方形PMEN被直线BD分成2:1两部分时,直接写出t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)当点N落在边DC上时,求t的值.
(2)求S与t的函数关系式.
(3)当正方形PMEN被直线BD分成2:1两部分时,直接写出t的值.
![](https://img.xkw.com/dksih/QBM/2018/4/21/1928821698830336/1930443668774912/STEM/67480bdd7d804cf29100f3f7f4ae6d41.png?resizew=171)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在正方形ABCD中,E、F分别在边CD、AD上,BE、CF交于点G,且BE=CF.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/25/b185d56f-0872-4b77-8b69-7cdc87cb8385.png?resizew=271)
(1)判断BE、CF的位置关系,并说明理由;
(2)如图1,若
,且
,求DF的长;
(3)如图2,过点F作CF的垂线,交AB于点M,交CD的延长线于点N,求证:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/25/b185d56f-0872-4b77-8b69-7cdc87cb8385.png?resizew=271)
(1)判断BE、CF的位置关系,并说明理由;
(2)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d527d4795ece4a5756d1cf8dba31e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e84c7afdbf3b5bee4f0b8ec09394d716.png)
(3)如图2,过点F作CF的垂线,交AB于点M,交CD的延长线于点N,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9854cc82b98db0367da4f5de8787da46.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,⊙O是
ABC的外接圆,∠ABC=45°,OC
AD,AD交BC的延长线于D,AB交OC于E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/d365846d-fbb3-43e5-90b7-5e2d73500faa.png?resizew=121)
(1)求证:AD是⊙O的切线;
(2)若AE=
,CE=2,求⊙O的半径和线段BC的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/d365846d-fbb3-43e5-90b7-5e2d73500faa.png?resizew=121)
(1)求证:AD是⊙O的切线;
(2)若AE=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b91d650c2fc1a741fabdb333b09aeb6.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐3】【教材呈现】如图时华师版八年级下册数学教材第104页的部分内容.
【问题解决】如图①,
、
是⊙O的两条直径.
(1)求证:四边形
是矩形.
【发现结论】矩形的四个顶点都在以该矩形对角线的交点为圆心,对角线的长为直径的圆上.
【结论应用】(2)如图②,已知线段
,以线段
为对角线构成矩形
,矩形
面积的最大值为 .
【拓展延伸】(3)如图③,在矩形
中,
,
,点
、
分别为边
、
的中点,以线段
为对角线构造矩形
,矩形
的边与矩形
的对角线
交于
、
两点,当
的长最长时,矩形
的面积为 .
1.如图,![]() ![]() ![]() ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c593ebdb2f1934a0cb56f8c44f454f8.png)
【发现结论】矩形的四个顶点都在以该矩形对角线的交点为圆心,对角线的长为直径的圆上.
【结论应用】(2)如图②,已知线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c593ebdb2f1934a0cb56f8c44f454f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c593ebdb2f1934a0cb56f8c44f454f8.png)
【拓展延伸】(3)如图③,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9228b213dc6b256b752b38a466ebec93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1522a9c3b2466395570c2689a4055584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1522a9c3b2466395570c2689a4055584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1522a9c3b2466395570c2689a4055584.png)
![](https://img.xkw.com/dksih/QBM/2021/7/13/2763481303785472/2817167785639936/STEM/bb36ae8e-6e45-4d2f-88e2-f68ccb578690.png?resizew=483)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】已知:抛物线
与x轴相交于
,
两点,与y轴相交于点C,连接
,点M为坐标平面内一点且横坐标为m.
![](https://img.xkw.com/dksih/QBM/2023/1/8/3148361152323584/3153241298624512/STEM/a0e2ae3984a347c1858298309d9419e4.png?resizew=501)
(1)求抛物线的表达式并直接写出点C的坐标;
(2)如图,当点M为抛物线上第一象限内的点时,连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93d656686a538bd3f172fb22a2a52da4.png)
①求
面积的最大值;
②过点M作
垂足为N,当
时,请求出点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ceba6b11658f2cc227b1f550ba25c3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bda45b7f565147f18a5c83bb8a23142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2023/1/8/3148361152323584/3153241298624512/STEM/a0e2ae3984a347c1858298309d9419e4.png?resizew=501)
(1)求抛物线的表达式并直接写出点C的坐标;
(2)如图,当点M为抛物线上第一象限内的点时,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93d656686a538bd3f172fb22a2a52da4.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad3e2b2689dfe97ec82d473ab6cf469.png)
②过点M作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf271d6475f5305bc922677b4cfe28c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bb8c2547322fc39a43b6931b80ec0bb.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在正方形
中,
,点
是
边上一点,连接
,将线段
绕点
顺时针旋转
得到线段
,连接
交
于点
,连接
,过点
作
交
延长线于点
.
![](https://img.xkw.com/dksih/QBM/2020/11/2/2584234985586688/2585527664779264/STEM/518ec3feec194d06868cc24be0575634.png?resizew=160)
(1)求证:
;
(2)若
,求线段
绕点
顺时针旋转
所形成的图形面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c13ab7f17263c4e6163d960f1c5060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/2020/11/2/2584234985586688/2585527664779264/STEM/518ec3feec194d06868cc24be0575634.png?resizew=160)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/795e6de3268eb38deaa5f420bff66e83.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adfcc501cee82b075f608695f588f893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,直线
分别与x轴y轴交于A、B两点,反比例函数
的图像与直线AB交于C,D两点点C的坐标为(2,n),连接OC,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/2/0790c34b-fb29-4db6-95db-154583570572.jpg?resizew=230)
(1)求反比例函数的表达式:
(2)若x轴上有一点P,使∠ODP=90°,求点P的坐标;
(3)若y1≥y2,请直接写出x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15413c66c16eec43b87e832c1298b1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d358d03fbf6a68b10d50789bb8c7b01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5491be33e34f24a3be34f9ae09078a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/2/0790c34b-fb29-4db6-95db-154583570572.jpg?resizew=230)
(1)求反比例函数的表达式:
(2)若x轴上有一点P,使∠ODP=90°,求点P的坐标;
(3)若y1≥y2,请直接写出x的取值范围.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在菱形
中,
,
,过点
作
于点
,
于点
.
如图
,连接
分别交
、
于点
、
,求证:
;
如图
,将
以点
为旋转中心旋转,其两边
、
分别与直线
、
相交于点
、
,连接
,当
的面积等于
时,求旋转角的大小并指明旋转方向.
![](https://img.xkw.com/dksih/QBM/2018/9/9/2028708244799488/2037958055444480/STEM/9c45ae73-cb0f-45dd-a843-6717babdb960.png?resizew=260)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7fa3aea72ccc36948a4a90f7368f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93697062fb85a0dabcfedc28cb86338b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20e5d585fbf903ee5affa6d083ab95f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a8a46105dd85172c00b4ac8405d842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a679040c4d556723e482bacbab41356d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8763b11523f3fd2006e9f2592f93ed5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c680d8e069da56e7f7229bc70648bd54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0339c1592797e94054cbbc3bacbea54a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eecb3e34fc7c3ab8818cb7b2f4de11f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5736afeea5d448920daf96685cfb419.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c29b5e7f624b3f2aaba1b06a35f07d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b283dff34b1dcf9582484f0c7adc87f4.png)
![](https://img.xkw.com/dksih/QBM/2018/9/9/2028708244799488/2037958055444480/STEM/9c45ae73-cb0f-45dd-a843-6717babdb960.png?resizew=260)
![](https://img.xkw.com/dksih/QBM/2018/9/9/2028708244799488/2037958055444480/STEM/df34c7d3-1f10-4eb5-970a-1f7532ee83e1.png?resizew=294)
您最近一年使用:0次