已知抛物线
与x轴交于点
,
,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987806576640000/2992661428174848/STEM/66800771-ff0e-44c0-bc9b-1da856c411d1.png?resizew=372)
(1)求抛物线的函数解析式.
(2)如图1,点D在抛物线上,过点D作
轴,交直线BC于点E,交x轴于点F,设点D的横坐标为m,且
,求线段DE长度的最大值.
(3)如图2,设M为抛物线的顶点,
,在y轴上是否存在点Q,使得
?若存在,求出点Q的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358e2987096a67189bcc2a642da39524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987806576640000/2992661428174848/STEM/66800771-ff0e-44c0-bc9b-1da856c411d1.png?resizew=372)
(1)求抛物线的函数解析式.
(2)如图1,点D在抛物线上,过点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/010989c488d7f0551c9f2aa8bba6bf1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1464ddc459a7d19e2ff4e322c171e123.png)
(3)如图2,设M为抛物线的顶点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ecab76dc432d7571230ae427262c222.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caeeab8917ab89f1379d9b846653b463.png)
更新时间:2022-06-02 14:08:10
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【推荐1】如图,在平面直角坐标系中,抛物线
与x轴交于A、B两点,与y轴交于点C,连接BC,
,对称轴为直线
,点D为此抛物线的顶点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/7/95782e7c-7382-498f-b312-5caf54e431a3.png?resizew=169)
(1)求抛物线的解析式及D点坐标;
(2)点E是第一象限内抛物线上的动点,连接BE和CE,求
面积的最大值;
(3)点P在抛物线的对称轴上,平面内存在点Q,使以点B、C、P、Q为顶点的四边形为矩形,请直接写出点Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f998f27d8fc98ad8733bbcc3be0f482a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52705567101a48893de582656ef41527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/7/95782e7c-7382-498f-b312-5caf54e431a3.png?resizew=169)
(1)求抛物线的解析式及D点坐标;
(2)点E是第一象限内抛物线上的动点,连接BE和CE,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
(3)点P在抛物线的对称轴上,平面内存在点Q,使以点B、C、P、Q为顶点的四边形为矩形,请直接写出点Q的坐标.
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【推荐2】一名身高为1.8m的篮球运动员甲在距篮筐(点B)水平距离4m处跳起投篮,篮球准确落入篮筐,已知篮球的运动路线是抛物线,篮球在运动员甲头顶上方0.25m处(点A)出手,篮球在距离篮筐水平距离为1.5m处达到最大高度3.5m,以水平地面为x轴,篮球达到最大高度时的铅直方向为y轴,建立如图所示的平面直角坐标系.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/16/7decdad8-7b5b-46ca-801c-0923e02d905c.png?resizew=228)
(1)求篮球运动路线(抛物线)的函数解析式;
(2)求篮球出手时,运动员甲跳离地面的高度是多少米?
(3)已知运动员乙跳离地面时,最高能摸到3.3运动员乙在运动员甲与篮筐之间的什么范围内能在空中截住球?
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/16/7decdad8-7b5b-46ca-801c-0923e02d905c.png?resizew=228)
(1)求篮球运动路线(抛物线)的函数解析式;
(2)求篮球出手时,运动员甲跳离地面的高度是多少米?
(3)已知运动员乙跳离地面时,最高能摸到3.3运动员乙在运动员甲与篮筐之间的什么范围内能在空中截住球?
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【推荐1】如图1,抛物线
与直线
相交于点B和C,点B在x轴上,点C在y轴上,抛物线与x轴的另一个交点为A.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/8/69735183-5a15-415f-878d-f25933bfeaaf.png?resizew=368)
(1)求抛物线
的解析式;
(2)如图2,点
为直线
上方抛物线上一动点,
于点
轴于点
,交
于点
,求
周长的最大值以及点
的坐标;
(3)在(2)的结论下,将抛物线
沿射线
方向平移
个单位长度得到新抛物线
,新抛物线的顶点为
,平面内有一点
,以点
为顶点的四边形是平行四边形,请先求得点M的坐标,再直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812eed46a589bde8b7c78a81a8cf9b9a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/8/69735183-5a15-415f-878d-f25933bfeaaf.png?resizew=368)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
(2)如图2,点
![](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/c65334978b0519b379910dfc4acf8344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/744ee4c4690c83a94ed4855cc770e636.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)在(2)的结论下,将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cb3e1e50fc01cdf2153b61d6914eaa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.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/487ce295d24e97aee1b44a9960ed3816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
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【推荐2】在平面直角坐标系中,
为原点,矩形
的顶点
,
,等边三角形
的顶点
,顶点
在第二象限.
的坐标为______________,点
的坐标为______________;
(2)将
沿
轴向右平移,得
,点
,
,
的对应点分别为
.设
,
与矩形
重叠部分的面积为
.
①如图②,当
与矩形
重叠部分为五边形时,边
与
相交于点
,边
与
相交于点
,试用含有
的式子表示
,并直接写出
的取值范围;
②当
时,求
的取值范围(直接写出结果即可).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0d256036d52b784b8c68bfc8db69d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422f688c37f5fecc578e969c3e730841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/820567942aa98b2feaaa017fcb7790df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89bd0c346d4db82305d7d87772544b66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e00bf73d03dded1cf5f83cc5339361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96bc38322d678a07d9c02b6b0d99763e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/55c949206d56f33d40e7c6cbbe492410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ec5b34559d44ba345133399644b485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96bc38322d678a07d9c02b6b0d99763e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
①如图②,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96bc38322d678a07d9c02b6b0d99763e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdb2f87d7a79bd800f2650a670a46761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cece895cbddf9d1f37f75e3b6346edda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01d09b6597604013fe98063d8698ebab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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【推荐1】如图,⊙O是△ABC的外接圆,点O在BC边上,∠BAC的平分线交⊙O于点D,连接BD、CD,过点D作BC的平行线与AC的延长线相交于点P.
![](https://img.xkw.com/dksih/QBM/2020/4/2/2432975740198912/2433701713231872/STEM/9737ffe09a624085b027742143ce80d4.png?resizew=201)
(1)求证:PD是⊙O的切线;
(2)求证:AB•CP=BD•CD;
(3)当AB=5 cm,AC=12 cm时,求线段PC的长.
![](https://img.xkw.com/dksih/QBM/2020/4/2/2432975740198912/2433701713231872/STEM/9737ffe09a624085b027742143ce80d4.png?resizew=201)
(1)求证:PD是⊙O的切线;
(2)求证:AB•CP=BD•CD;
(3)当AB=5 cm,AC=12 cm时,求线段PC的长.
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【推荐2】抛物线y=ax2+bx+3(a≠0)经过点A(﹣1,0),B(
,0),且与y轴相交于点C.
(1)求这条抛物线的表达式;
(2)求∠ACB的度数;
(3)设点D是所求抛物线第一象限上一点,且在对称轴的右侧,点E在线段AC上,且DE⊥AC,当△DCE与△AOC相似时,求点D的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
(1)求这条抛物线的表达式;
(2)求∠ACB的度数;
(3)设点D是所求抛物线第一象限上一点,且在对称轴的右侧,点E在线段AC上,且DE⊥AC,当△DCE与△AOC相似时,求点D的坐标.
![](https://img.xkw.com/dksih/QBM/2018/12/4/2089784384028672/2091515801149440/STEM/bef30a208b49407485ff2e5d9c89c25e.png?resizew=159)
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【推荐1】如图,抛物线y=ax2+bx﹣3经过点A(2,﹣3),与x轴负半轴交于点B,与y轴交于点C,且OC=3OB.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/041a3b51-482c-4765-bae9-eb06da432cbd.png?resizew=164)
(1)求抛物线的解析式;
(2)抛物线的对称轴上有一点P,使PB+PC的值最小,求点P的坐标;
(3)点M在抛物线上,点N在抛物线的对称轴上,是否存在以点A,B,M,N为顶点的四边形是平行四边形?若存在,直接写出所有符合条件的点M的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/041a3b51-482c-4765-bae9-eb06da432cbd.png?resizew=164)
(1)求抛物线的解析式;
(2)抛物线的对称轴上有一点P,使PB+PC的值最小,求点P的坐标;
(3)点M在抛物线上,点N在抛物线的对称轴上,是否存在以点A,B,M,N为顶点的四边形是平行四边形?若存在,直接写出所有符合条件的点M的坐标;若不存在,请说明理由.
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【推荐2】在平面直角坐标系中,直线y=﹣x﹣2与x轴交于点A,与y轴交于点B,抛物线y=ax2+bx+c(a>0)经过A,B两点,并与x轴的正半轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/23/8c0772f2-bf23-452e-b8f5-645769bc52d5.png?resizew=143)
(1)求a,b满足的关系式及c的值;
(2)当a=
时,若点P是抛物线对称轴上的一个动点,求△PAB周长的最小值;
(3)当a=1时,若点Q是直线AB下方抛物线上的一个动点,过点Q作QD⊥AB于点D,当QD的值最大时,求此时点Q的坐标及QD的最大值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/23/18009bad-93bf-436a-8abe-875abc860b5a.png?resizew=156)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/23/8c0772f2-bf23-452e-b8f5-645769bc52d5.png?resizew=143)
(1)求a,b满足的关系式及c的值;
(2)当a=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
(3)当a=1时,若点Q是直线AB下方抛物线上的一个动点,过点Q作QD⊥AB于点D,当QD的值最大时,求此时点Q的坐标及QD的最大值.
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