如图,在平面直角坐标系中,抛物线
与y轴交于点C,与x轴交于
、
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/0897481c-d602-4119-9a6d-2ab106ff6871.png?resizew=193)
(1)求抛物线的解析式;
(2)点M从A点出发,在线段AB上以每秒3个单位长度的速度向B点运动,同时点N从B点出发,在线段BC上以每秒2个单位长度的速度向C点运动,其中一个点到达终点时,另一个点也停止运动,设
的面积为S,点M运动时间为t秒,试求S与t的函数关系,并求S的最大值;
(3)在点M运动过程中,是否存在某一时刻t,使
为直角三角形﹖若存在,求出t的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/415ce7008a89ffca8c3c3edbf13a935e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/0897481c-d602-4119-9a6d-2ab106ff6871.png?resizew=193)
(1)求抛物线的解析式;
(2)点M从A点出发,在线段AB上以每秒3个单位长度的速度向B点运动,同时点N从B点出发,在线段BC上以每秒2个单位长度的速度向C点运动,其中一个点到达终点时,另一个点也停止运动,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbec471ffed534e60ec40d48b9f0968.png)
(3)在点M运动过程中,是否存在某一时刻t,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbec471ffed534e60ec40d48b9f0968.png)
2022·海南海口·模拟预测 查看更多[2]
更新时间:2022-12-14 17:31:31
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】如图(1),P为
所在平面上一点,且
,此时
的和最小,称为
的费马距离.
(1)若点P是等边三角形三条高的交点,点P (填是或不是)该三角形的费马点.
(2)如图(2),分别以
、
为边向外作正
和正
,
和
相交于P点.求证:P点为
的费马点.
(3)若图(2)中,
,
,
,则
的费马距离= .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1eab88a16df610f20dd46a44ba098d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7ed53a398b1d6b7b4abbb43a9abcf1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/15/947a1949-e316-4766-8310-82a9d6241c3f.png?resizew=350)
(1)若点P是等边三角形三条高的交点,点P (填是或不是)该三角形的费马点.
(2)如图(2),分别以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)若图(2)中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc490fd9c850622aa2beaf5d38d46459.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐2】如图,在△ABC中,将线段AC绕点C逆时针旋转60°到线段CD,点D恰好落在AB边上,点E是BC边上一点,连接AE、DE,∠AEC=∠BED=60°.
![](https://img.xkw.com/dksih/QBM/2022/4/9/2954643344629760/2958200745721856/STEM/47db18f0-694d-4d9b-83a0-c4391ea848cd.png?resizew=580)
(1)如图1,已知
,
,求AE的长度;
(2)如图2,在AC上截取
,连接DF交AE于点G,求证:
;
(3)如图3,在(2)的条件下,已知
,
,将△ABE沿AB所在直线翻折到△ABC同一平面内,得到
,连接
交AB于点M,请直接写出
的值.
![](https://img.xkw.com/dksih/QBM/2022/4/9/2954643344629760/2958200745721856/STEM/47db18f0-694d-4d9b-83a0-c4391ea848cd.png?resizew=580)
(1)如图1,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c013bbe1fb6e9acf461548b5cf6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202262caed6869a80feee0cb861a210b.png)
(2)如图2,在AC上截取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd8e8b8dc232a88228f377b7782db172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fda71eb7b5c5562c2cc58a41181ae3b2.png)
(3)如图3,在(2)的条件下,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c99fc553ecb3e2afdb7058201bc642.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/678988261e6fd7c4f1199c0204a8045d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1201f9efbe51c5d9eba973d9f9831159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f0ae0d8e74c9ca1708ce83c36c94df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eafc92e2353fba2df6d6381d295ae5f1.png)
您最近一年使用:0次
解答题-计算题
|
较难
(0.4)
真题
【推荐1】如图,在梯形ABCD中,AD∥BC,∠ABC=90°,∠BCD=45°,点E在BC上,且∠AEB=60°.若AB=2
,AD=1,求CD和CE的长.(注意:本题中的计算过程和结果均保留根号)
![](https://img.xkw.com/dksih/QBM/2014/7/30/1573742215438336/1573742221484032/STEM/48c58c5647d646bcaf21fc724c21c681.png)
![](https://img.xkw.com/dksih/QBM/2014/7/30/1573742215438336/1573742221484032/STEM/094fb56f94ed488580942b22973e5f68.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】已知抛物线
(
,
为常数,且
),与
轴交于点
,
两点,与
轴相交于点
.
(1)当
时,求抛物线的顶点坐标;
(2)点
为抛物线对称轴上一点,点
的纵坐标为
,若
,求抛物线的解析式:
(3)当
时,抛物线的对称轴与
轴交于点
,过点
作直线
垂直于
轴,垂足为
,
为直线
上一动点,
为线段
上一动点,当
的最小值为
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b8c15713714abc0f68266e776c411a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
(2)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/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cead256658d6f874b3b298f8dd2c055.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e34f42b3be15518c29e3689c9fe6d6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f33d5da5b703548971a13412d90a5f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12cf4e307f8a7ef3229d300e66b9ed06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f17ac21d3d9bd0acfb19488d6070462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图二次函数y=ax2+bx-2的图象交x轴于A(﹣1,0),B(2,0)两点,交y轴于点C,过A,C两点画直线.
(1)求二次函数的解析式;
(2)在平面直角坐标系中是否存在点D,使以A、B、C、D为顶点的四边形是平行四边形,如果存在,请直接写出点D的坐标,如果不存在,请说明理由。
(3)若点Q在AC下方的抛物线上运动,求以A、C、Q为顶点的三角形的面积最大值.
(1)求二次函数的解析式;
(2)在平面直角坐标系中是否存在点D,使以A、B、C、D为顶点的四边形是平行四边形,如果存在,请直接写出点D的坐标,如果不存在,请说明理由。
(3)若点Q在AC下方的抛物线上运动,求以A、C、Q为顶点的三角形的面积最大值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/2d34ad44-8622-4165-a81c-5b4806cf3fa3.png?resizew=201)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,若抛物线
与直线
的两个交点A,B关于原点对称,则称线段AB为抛物线的“对称弦”,该直线为抛物线的“对称弦直线”.已知抛物线
交y轴于点
,与其“对称弦直线”
交于点A,B.
![](https://img.xkw.com/dksih/QBM/2022/4/26/2973474160287744/2981418175168512/STEM/e5ca3151-760e-4f83-979d-0d5b9386e7e6.png?resizew=495)
(1)若该抛物线的“对称弦直线”为
,求抛物线的函数解析式;
(2)在(1)的条件下,点P为抛物线上A点右侧一点,连接CP交AB于点E,连接BP,BC,当
时,求P点坐标;
(3)当该抛物线对称轴在y轴左侧时,抛物线上是否存在点H,使得
是以“对称弦”AB为斜边的等腰直角三角形,若存在,请求出此时抛物线解析式;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e927521ec50d886fc50746f788961d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ec7f84f716a316ec92d133927666c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2973474160287744/2981418175168512/STEM/e5ca3151-760e-4f83-979d-0d5b9386e7e6.png?resizew=495)
(1)若该抛物线的“对称弦直线”为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
(2)在(1)的条件下,点P为抛物线上A点右侧一点,连接CP交AB于点E,连接BP,BC,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab7da85bd800413343402a35f5f4d883.png)
(3)当该抛物线对称轴在y轴左侧时,抛物线上是否存在点H,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370abdf35cb8817d35b78eea892731ce.png)
您最近一年使用:0次