在平面直角坐标系中,点O(0,0),点A(1,0).已知抛物线y=x2+mx﹣2m(m是常数),顶点为P.
(Ⅰ)当抛物线经过点A时,求顶点P的坐标;
(Ⅱ)若点P在x轴下方,当∠AOP=45°时,若函数值y>0,求对应自变量x的取值范围;
(Ⅲ)无论m取何值,该抛物线都经过定点H.当∠AHP=45°时,求抛物线的解析式.
(Ⅰ)当抛物线经过点A时,求顶点P的坐标;
(Ⅱ)若点P在x轴下方,当∠AOP=45°时,若函数值y>0,求对应自变量x的取值范围;
(Ⅲ)无论m取何值,该抛物线都经过定点H.当∠AHP=45°时,求抛物线的解析式.
更新时间:2020-02-24 18:16:05
|
【知识点】 其他问题(二次函数综合)
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,抛物线
交x轴于A、B两点,交y轴于点C.直线BC的解析式为
.
![](https://img.xkw.com/dksih/QBM/2022/5/7/2974329850830848/2975776513081344/STEM/c019a273-42bf-481d-b7f3-ef554de8391d.png?resizew=406)
(1)求抛物线的解析式;
(2)点P为抛物线第一象限函数图象上一点,设P点的横坐标为m,连接PA交y轴于点E,交BC于点F,设CE的长为d,求d与m的函数关系式,直接写出m的取值范围;
(3)在(2)的条件下,若Р点在对称轴的右侧且PA被BC平分,连接PC,将PC绕点P逆时旋转90度得到PQ,过点Q作QG
AP交直线CP于点G,求G点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1882d2f789de61b5b7e3ec952e13b99e.png)
![](https://img.xkw.com/dksih/QBM/2022/5/7/2974329850830848/2975776513081344/STEM/c019a273-42bf-481d-b7f3-ef554de8391d.png?resizew=406)
(1)求抛物线的解析式;
(2)点P为抛物线第一象限函数图象上一点,设P点的横坐标为m,连接PA交y轴于点E,交BC于点F,设CE的长为d,求d与m的函数关系式,直接写出m的取值范围;
(3)在(2)的条件下,若Р点在对称轴的右侧且PA被BC平分,连接PC,将PC绕点P逆时旋转90度得到PQ,过点Q作QG
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】定义:在平面直角坐标系中,我们称抛物线
为直线
的“共生抛物线”.
(1)如图1,直线
与其中一条“共生抛物线”交于A,B两点(点B在x轴上,点A在点B的左侧),与x轴负半轴交于点
,求这条“共生抛物线”的表达式及点A的坐标;
上方的部分沿直线
翻折,图像其余的部分保持不变,得到的新函数图像记为G.点
在图像G上,且
,求m的取值范围;
(3)如图2,直线
与y轴交于点
,依次作正方形
,正方形
,…,正方形
(n为正整数),使得点
,
,
,…,
均在直线
上,点
,
,
,…,
在x轴负半轴上.
①直接写出下列点的坐标:
,
,
,
.
②试判断点
,
…,
是否在同一条直线上?若是,请求出这条直线的解析式;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831c7ede06cf6892135c65d873da89d1.png)
(1)如图1,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec89d17a1b8f7961e2f1f27c2d50685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074607c0433fba528892e98a13316bed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107babba45f110012183dc4dc54490f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107babba45f110012183dc4dc54490f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b7971b7810cd949482745b462b6456a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdf5b5b124e081c85c9d8818d1917611.png)
(3)如图2,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec89d17a1b8f7961e2f1f27c2d50685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5a1ffddf3ea050229f9e0ab70d7a2c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe531bf54e95675893061b0612e3ef49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14f10686d8acd3b4f53e1665ef94e23d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c296e45b84cf67a98939aa7334e7d478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8ce8c07e34224e2d25130ed27c9a98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d4e8502106802f1485c3b0f28f2664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec89d17a1b8f7961e2f1f27c2d50685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1282962a17a48a18edf733204054d67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9da2b0e7b9eca965043be2f38a91f1.png)
①直接写出下列点的坐标:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4f150ab98bde511e0f65d9bafab031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b4dbe5d5c8b9c28c6f5eb92278a9f17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a78b3c84e7818ed70018eea40c72665.png)
②试判断点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4f150ab98bde511e0f65d9bafab031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a78b3c84e7818ed70018eea40c72665.png)
您最近一年使用:0次