已知抛物线
经过点
,与y轴交于点A,其顶点为B,设k是抛物线
与x轴交点的横坐标.
(1)求
的面积;
(2)求代数式
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9301d07e0bbce75c450bd0a4a9965ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e88ebfb5c0d6cce558b515be06404d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9301d07e0bbce75c450bd0a4a9965ec0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
(2)求代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc66aaa6da6d7639c56cf48a1da48220.png)
2023·云南昆明·一模 查看更多[2]
更新时间:2023-08-05 16:47:24
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较难
(0.4)
【推荐1】已知抛物线
与x轴相交于
,B(3,0)两点,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/2022/3/30/2947403497922560/2955057295015936/STEM/2a857efe2b03449096beb22daee260b0.png?resizew=230)
(1)求抛物线的解析式及点C的坐标;
(2)点D(m,0)是x轴上一动点,且
,过点D作直线
轴交直线BC于点E,交抛物线与点P,过点P作
于点H.当
与
全等时,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c03289c25b274eb51ecb90f7690acc10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://img.xkw.com/dksih/QBM/2022/3/30/2947403497922560/2955057295015936/STEM/2a857efe2b03449096beb22daee260b0.png?resizew=230)
(1)求抛物线的解析式及点C的坐标;
(2)点D(m,0)是x轴上一动点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd8ba8bfcbf4c2e2c47e83403bd8902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/165a501b2e6a3acc46212e59a166c053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef7eab528a8dd3e3f328de3b3ac80ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9808abd3f9239cd13ba531817a920d5.png)
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【推荐2】如图,在平面直角坐标系中,抛物线
与
轴交于点
,
两点,与
轴交于点
,连接
,
.
的面积;
(2)如图,点
是直线
上方抛物线上一点,
是线段
上一点且满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
,求
的最大值及此时点
的坐标;
(3)将该抛物线沿射线
方向平移
个单位得到新的抛物线
,
为
与
轴的交点,
为新抛物线
对称轴上一点,点
平移后的对应点为
,在平面内确定一点
,使得以
,
,
,
为顶点的四边形是以
为边的菱形,请直接写出所有符合条件的点
的坐标,并写出其中一种情况的过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cefab84b73ed1234668f2f090ef6180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
(2)如图,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6967ebd791092c62b4ef97924d91883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0df7ce8e2253fa160c15a9835958df62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)将该抛物线沿射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b22a1e95e9685a94178d4ff36d4c994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐1】如图,抛物线
交
轴于点
和点
,交
轴于点
.
(1)求抛物线的函数表达式;
(2)若点
在抛物线上,且
,求点
的坐标;
(3)如图,设点
是线段
上的一动点,作
轴,交抛物线于点
,求线段
长度的最大值,并求出
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a18a7caa080988802ba1145b4fe4203.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/c052d7af2f98d95bac8725b608fba0fc.png)
(1)求抛物线的函数表达式;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9f5ba099382b39ba1c843a67c797e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图,设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675e5e245e13ce0658233bed7a7872e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94b726cf24ace7b575fc58e8de7da2f2.png)
![](https://img.xkw.com/dksih/QBM/2019/5/6/2197752709275648/2197998366842880/STEM/2803128838ed40b3a77b11dac6d0c0d7.png?resizew=292)
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【推荐2】如图,在平面直角坐标系中,直线y=﹣x+3与y轴交于点A,与x轴交于点B.抛物线y=﹣x2+bx+c过A、B两点.
![](https://img.xkw.com/dksih/QBM/2022/4/26/2966644140752896/2968806211289088/STEM/391a0acada1143f1b70a91f19ae20eee.png?resizew=235)
(1)点A,B的坐标分别是A ,B ;
(2)求抛物线的解析式;
(3)过点A作AC平行于x轴,交抛物线于点C,点P为抛物线上一动点(点P在AC上方),作PD平行于y轴交AB于点D,问当点P在何位置时,四边形APCD的面积最大?并求出最大面积.
![](https://img.xkw.com/dksih/QBM/2022/4/26/2966644140752896/2968806211289088/STEM/391a0acada1143f1b70a91f19ae20eee.png?resizew=235)
(1)点A,B的坐标分别是A ,B ;
(2)求抛物线的解析式;
(3)过点A作AC平行于x轴,交抛物线于点C,点P为抛物线上一动点(点P在AC上方),作PD平行于y轴交AB于点D,问当点P在何位置时,四边形APCD的面积最大?并求出最大面积.
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