如图,已知抛物线
交x轴的正半轴于点A,交y轴于点B,动点
在x轴上,过点C作x轴的垂线交线段
于点D,交该抛物线于点P,连接
交
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/25/355fbb58-6b77-40bf-84f6-a08ff909cf5d.png?resizew=152)
(1)求点A,B的坐标.
(2)当
时,求线段
的长.
(3)当
是以
为腰的等腰三角形时,求m的值.(直接写出答案即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ce7d85ec793a1055adb54ba02164ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0335684e3cb39e6920971150b03807e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/25/355fbb58-6b77-40bf-84f6-a08ff909cf5d.png?resizew=152)
(1)求点A,B的坐标.
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/022f0dc17db5fcc83b204dc845447ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
更新时间:2023-04-23 20:14:07
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相似题推荐
解答题-问答题
|
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(0.4)
名校
【推荐1】如图,抛物线
与x轴交于点A和点B,与y轴交于点C,
.
![](https://img.xkw.com/dksih/QBM/2022/4/11/2955852620521472/2957327183478784/STEM/be2aede2-c522-4d58-9734-c3fd98484a03.png?resizew=209)
(1)求该抛物线的函数解折式;
(2)连接BC,点D是线段BC上方抛物线上的一点,连接OD,CD,OD交BC于点E,是否存在点D使
,若存在,请直接写出点D的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/057637a2c0c6689485c4e4cdac351ccb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40d398e31d27052f0b689bb30706faac.png)
![](https://img.xkw.com/dksih/QBM/2022/4/11/2955852620521472/2957327183478784/STEM/be2aede2-c522-4d58-9734-c3fd98484a03.png?resizew=209)
(1)求该抛物线的函数解折式;
(2)连接BC,点D是线段BC上方抛物线上的一点,连接OD,CD,OD交BC于点E,是否存在点D使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a57c1557dfe6fce44112d718a2f1e1.png)
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【推荐2】已知抛物线y=-x2+2x+3与x轴交于A、B两点(点A在点B的左侧),与y轴交于点C,顶点为D,直线CD与x轴交于点E.
(1)求A、B的坐标;
(2)求点E的坐标;
(3)过线段OB的中点N作x轴的垂线并交直线CD于点F,则直线NF上是否存在点M,使得点M到直线CD的距离等于点M到原点O的距离?若存在,求出点M的坐标;若不存在,请说明理由.
(1)求A、B的坐标;
(2)求点E的坐标;
(3)过线段OB的中点N作x轴的垂线并交直线CD于点F,则直线NF上是否存在点M,使得点M到直线CD的距离等于点M到原点O的距离?若存在,求出点M的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2020/7/10/2502765163143168/2503866934689792/STEM/8317314b-e5a7-4a4b-8a32-69d38904b10a.png?resizew=229)
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【推荐1】在
中,
,点D(与点B、C不重合)为射线
上一动点,连接
,以
为一边且在
的右侧作正方形
.
(1)如果
,如图①,且点D在线段
上运动,试判断线段
与
之间的位置关系,并证明你的结论.
(2)如果
,如图②,且点D在线段
上运动,(1)中结论是否成立,为什么?
(3)若正方形
的边
所在直线与线段
所在直线相交于点P,设
,
,
,求线段
的长,(用含x的式子表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27e47690ed332c573186992b6d25654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/30/6b2b687f-6e86-4f92-acdf-ecc69d1151e2.png?resizew=325)
(1)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb980da8e86b4cfd322616dc84fc6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)若正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4fc2d383876afe5be1103352571805b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4a7d7c2253a1686c61f8b8f3f6c6a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
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【推荐2】正方形
,
、
分别在边
、
上(不与端点重合),
,
与
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/6b9d45cf-0994-4093-9c38-b397d870ee4a.png?resizew=483)
(1)如图①,若
平分
,直接写出线段
,
,
之间等量关系;
(2)如图②,若
不平分
,(1)中线段
,
,
之间等量关系还成立吗?若成立请证明;若不成立,请说明理由;
(3)如图③,矩形
,
,
.点
、
分别在边
,
上,
,
,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/6b9d45cf-0994-4093-9c38-b397d870ee4a.png?resizew=483)
(1)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(2)如图②,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(3)如图③,矩形
![](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/04ee826937d2add7a93aaa1422f8b736.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e38a8a55cb53958aadf0c1502853f297.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4794cf7c57bdd4825d9e6615e2527a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
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解答题-证明题
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【推荐1】在矩形
中,
,点
为对角线
上任意一点(不与
、
重合),连接
,过点
作
,交线段
于点N.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/b37012f1-ac3b-4ef3-9e20-b65ac2ea7cf6.png?resizew=309)
(1)如图1,当
时;
①求
的值.
②若:
,求证:
;
(2)如图2,当
时,连接
交
于点
,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab8dca24aa37c0b17cfe4beb033e6c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e883f81c66ceef54d2d0556a68ed585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90b62aa75a1b3b42af8bb133e043bf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/b37012f1-ac3b-4ef3-9e20-b65ac2ea7cf6.png?resizew=309)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5487e806bcbc7bd42090ca90ef5bfe3.png)
②若:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c044b2a8ec7adce0df548cd0fa76224e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6619883500131ca27c672a58bc213672.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebfeeb519dc7385ac8c7cbf896a06fe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a3f913906d27cd5ca71e67ab00a6fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/296c0175e64e682ef9dd522e81d94e1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e61957149b0163aa7dace9c34a6b1d.png)
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【推荐2】在平面直角坐标系中,抛物线y=mx2﹣2mx﹣3m与x轴交于A、B两点(点A在点B左侧),与y轴交于点C,连接AC,BC,将△OBC沿BC所在的直线翻折,得到△DBC,连接OD.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/4a79a348-60f7-4950-bc94-a56eebc43f7c.png?resizew=234)
(1)点A的坐标为 ,点B的坐标为 .
(2)如图,若点D落在抛物线的对称轴上,且在x轴上方,求抛物线的解析式.
(3)设△OBD的面积为S1,△OAC的面积为S2,若S1=
S2,求m的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/4a79a348-60f7-4950-bc94-a56eebc43f7c.png?resizew=234)
(1)点A的坐标为 ,点B的坐标为 .
(2)如图,若点D落在抛物线的对称轴上,且在x轴上方,求抛物线的解析式.
(3)设△OBD的面积为S1,△OAC的面积为S2,若S1=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c0874f019492261eb175bdcc08c189d.png)
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【推荐3】(1)问题提出:如图①,在
中,点D、E分别是AB、AC上的点,连接DE,
,AF是
的角平分线,AF交DE于点G,若
,
,则
__________;
(2)问题探究:如图②,在
中,
,
,
,点E、F是AD的三等分点,连接BE、CF,求四边形EBCF的面积;
(3)问题解决:某生态公园有一块四边形绿地ABCD,如图③,
,
,
,
,
,连接AC,点E是BC的中点,点P、Q、M、N分别是BE、CE、AB、AC上的点,连接PM、MN、NQ.现要在四边形MNQP区域内种植郁金香,根据设计要求要使
,
,
.为了美观,要使种植郁金香的四边形MNQP区域的面积尽可能的大,四边形MNQP的面积是否存在最大值,若存在,请求出最大值及此时BP的长;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb6823a329628699619a39cde927510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38c5c9cc1ed4bce98b7fae77e70b227f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfca6b66b14f818be647116dc2a90ea1.png)
(2)问题探究:如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44cbab64c34b6317ee4c68ba7f8d56c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
(3)问题解决:某生态公园有一块四边形绿地ABCD,如图③,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d399eef6eee6ce110d4abf939c742297.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67f07571aee5cd39e2ff450fe12b627b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fb425646bdc3c4f06987ed3061750bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8cfd06965af6014208127f2880b476b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/198beeaef815604729e37c09b24da353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1cfa54ba2d5b8afa9b386d51ac632f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97044db44deffaf9c15b9c824b3379c9.png)
![](https://img.xkw.com/dksih/QBM/2022/6/1/2992083253805056/2994819981172736/STEM/53866886-99c9-454e-8e37-d01fc82de36e.png?resizew=534)
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真题
【推荐1】如图,经过点A(0,﹣6)的抛物线
与x轴相交于B(﹣2,0),C两点.
(1)求此抛物线的函数关系式和顶点D的坐标;
(2)将(1)中求得的抛物线向左平移1个单位长度,再向上平移m(m>0)个单位长度得到新抛物线y1,若新抛物线y1的顶点P在△ABC内,求m的取值范围;
(3)在(2)的结论下,新抛物线y1上是否存在点Q,使得△QAB是以AB为底边的等腰三角形?请分析所有可能出现的情况,并直接写出相对应的m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c468dc5cc34c14a188493a21019e8f83.png)
(1)求此抛物线的函数关系式和顶点D的坐标;
(2)将(1)中求得的抛物线向左平移1个单位长度,再向上平移m(m>0)个单位长度得到新抛物线y1,若新抛物线y1的顶点P在△ABC内,求m的取值范围;
(3)在(2)的结论下,新抛物线y1上是否存在点Q,使得△QAB是以AB为底边的等腰三角形?请分析所有可能出现的情况,并直接写出相对应的m的取值范围.
![](https://img.xkw.com/dksih/QBM/2014/9/29/1573751556792320/1573751563190272/STEM/3d601dbf0e5147f495cf6a93abee5fe7.png)
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解答题-证明题
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较难
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【推荐2】如图,在平面直角坐标系中,点M的坐标是(5,4),⊙M与y轴相切于点C,与x轴相交于A,B两点.
![](https://img.xkw.com/dksih/QBM/2022/2/26/2924872228126720/2927080724660224/STEM/0b63f1d9915c4e32b20e7d06f4df0d14.png?resizew=168)
(1)则点A,B,C的坐标分别是A( , ),B( , ),C( , );
(2)设经过A,B两点的抛物线的解析式为y=
(x﹣5)2+k,它的顶点为F,求证:直线FA与⊙M相切;
(3)在抛物线的对称轴上,是否存在点P,且点P在x轴的上方,使△PBC是等腰三角形,如果存在,请求出点P的坐标;如果不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2022/2/26/2924872228126720/2927080724660224/STEM/0b63f1d9915c4e32b20e7d06f4df0d14.png?resizew=168)
(1)则点A,B,C的坐标分别是A( , ),B( , ),C( , );
(2)设经过A,B两点的抛物线的解析式为y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f83e277347825ae248977162a6a6f70.png)
(3)在抛物线的对称轴上,是否存在点P,且点P在x轴的上方,使△PBC是等腰三角形,如果存在,请求出点P的坐标;如果不存在,请说明理由.
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