将二次函数
的图像向左平移1个单位长度,再向下平移4个单位长度.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/54007fbc-80c6-44f4-94e4-4046da07a47f.png?resizew=170)
(1)写出平移后的二次函数表达式;
(2)在平面直角坐标系中画出平移后的二次函数的图像;
(3)观察(2)中所画图像,当
时,直接写出y的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/54007fbc-80c6-44f4-94e4-4046da07a47f.png?resizew=170)
(1)写出平移后的二次函数表达式;
(2)在平面直角坐标系中画出平移后的二次函数的图像;
(3)观察(2)中所画图像,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9494f8aac293df6806b117ed2b6d2c35.png)
更新时间:2022-11-26 09:26:58
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相似题推荐
解答题-问答题
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适中
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【推荐1】已知点
和点
在抛物线
上.
的值及点
的坐标;
(2)点
在
轴上,且
是以
为直角边的三角形,求点
的坐标;
(3)将抛物线
向右并向下平移,记平移后点
的对应点为
,点
的对应点为
,若四边形
为正方形,求此时抛物线的表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26e58c354e0e3043313e9dea8374a1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e3b6ff59b12a0d55fa2dc8cc0f34fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05f3023b526438933a05bed6f671730d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05f3023b526438933a05bed6f671730d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdcfe69b939fd1c271747fe9d37ccdf9.png)
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【推荐2】如图,直线
交x轴于点B,交y轴于点A,抛物线
经过点A,B,点C为抛物线的顶点.
![](https://img.xkw.com/dksih/QBM/2022/4/27/2967354227269632/2968753333460992/STEM/b6be097e-e3a7-462f-9f9b-e2aac0170d36.png?resizew=257)
(1)求抛物线的解析式及点C的坐标;
(2)将抛物线
向下平移m个单位长度.
①当
时,用含m的式子表示y的取值范围;
②点C的对应点为
,连接
,
,若
,求m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e235d7dd12f948f5ffb2e5afddc95612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22106baba401cfaef881253e49c3c777.png)
![](https://img.xkw.com/dksih/QBM/2022/4/27/2967354227269632/2968753333460992/STEM/b6be097e-e3a7-462f-9f9b-e2aac0170d36.png?resizew=257)
(1)求抛物线的解析式及点C的坐标;
(2)将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22106baba401cfaef881253e49c3c777.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836d745b71ec18b1135e8bbf6990bffa.png)
②点C的对应点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c92b5799d12ea37de46d7c942ce7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0f0ccc8492a0ccf1eee24867060643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62bb0b70f74c7925ed9625d96b8b56eb.png)
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名校
【推荐1】小明根据学习函数的经验,对函数
的图象与性质进行了探究.下面是小明的探究过程,请补充完整:
自变量
的取值范围是___________,
与
的几组对应数值如下表:
其中
;
如图,在平面直角坐标系
中,描出了以上表中各组对应值为坐标的点,根据描出的点,画出该函数的图象;
观察函数图象,写出一条该函数的性质______;
进一步探究函数图象发现:
①方程
有______个互不相等的实数根;
②有两个点
和
在此函数图象上,当
时,比较
和
的大小关系为:
______
(填
)
③若关于
的方程
有
个互不相等的实数根,则
的取值范围是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df6d19ccc07fcfd94f6c1cf7656d35b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62295c36d2e2174908c2bec0eb5b30f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b49be5fb800b66cdb284b864e8f04a85.png)
①方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c72471f5a6c0af3abace8d56ac4413.png)
②有两个点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56720e2f2b0ddd72156da495923698da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2852ae85cfcc804b3192ea8543c88938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d48d84bca6f91b11f81fbbc164710d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10130bcef8de37d43892e26edbfa85a9.png)
③若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df7cfae1c3564eb2d4c74438834a5497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/48282a99-db6b-434f-a117-bcf5107b9b3a.png?resizew=236)
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【推荐2】在平面直角坐标系中,已知抛物线L:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/867e45b8a6efd9baa5b8cd8273224bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f5bb89c3ad435f1ef59307b174105ed.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/00e814d3-0ef5-4c14-9ae9-2b0de8d9ba58.png?resizew=222)
(1)当
时
①抛物线L的对称轴为直线
.
②若在抛物线L上有两点
,
,且
,则m的取值范围是 .
(2)抛物线L的对称轴与x轴交于点M,点M与点A关于y轴对称,将点M向右平移3个单位得到点B,若抛物线L与线段
恰有一个公共点,结合图象,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/867e45b8a6efd9baa5b8cd8273224bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f5bb89c3ad435f1ef59307b174105ed.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/00e814d3-0ef5-4c14-9ae9-2b0de8d9ba58.png?resizew=222)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
①抛物线L的对称轴为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
②若在抛物线L上有两点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7b2169af82b67687f88270b632b8786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96718982919e778ae41f03392d6704be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1113e9b568fb9ca3286582368e257a.png)
(2)抛物线L的对称轴与x轴交于点M,点M与点A关于y轴对称,将点M向右平移3个单位得到点B,若抛物线L与线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐3】已知抛物线
(a,b,c是常数,
)的自变量
与函数值y的部分对应值如下表所示:
(1)根据以上信息,可知抛物线开口向______,对称轴为______.
(2)求抛物线的解析式及
的值.
(3)请在下图所示的平面直角坐标系中画出所求的抛物线,设P为抛物线上的动点,过点P作直线
的垂线,垂足为M,
为线段PM的中点,描出相应的点
,再把相应的点
用平滑的曲线连接起来,猜想该曲线是哪种曲线(直接写出答案,不必说明理由).
(4)设直线
与抛物线
的两个交点记为
(
在左边),与(3)中的点
所在曲线的两个交点记为
(
在左边),请根据图象直接写出线段
,
之间的数量关系:______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![]() | … | ![]() | ![]() | ![]() | ![]() | 0 | 1 | 2 | … |
![]() | … | 5 | 0 | ![]() | ![]() | ![]() | 0 | 5 | … |
(2)求抛物线的解析式及
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
(3)请在下图所示的平面直角坐标系中画出所求的抛物线,设P为抛物线上的动点,过点P作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39cc033406da2cdd342308972c6701f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
(4)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebde378cbbe62df36b85d57500023a1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00442d96d695db2c58bf1fb7165fca94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfefd19874aeff8340735b3df468333.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b56e44e4f0424a2b7a45567120a2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4841a7238ffb7413e715d0dfde3c15f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fa7a2d83e2d14f51579ba94a96a4f8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/4/e321d55d-5933-419e-b7e1-fd766ae256e3.png?resizew=310)
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【推荐1】函数
经过点
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f8e0fdf5d5f29d739f3291fc809a73.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/15/f334b61c-a031-48c8-9580-9508c9a5ad3b.png?resizew=180)
(1)求此抛物线的解析式;
(2)画出二次函数的图象;
(3)结合函数图象,回答以下问题.当x______时,y随x的增大而增大,最大值为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60c496e971e2fe79617e75cfe0a2432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad8adc681552b6de39f05318786ebcef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f8e0fdf5d5f29d739f3291fc809a73.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/15/f334b61c-a031-48c8-9580-9508c9a5ad3b.png?resizew=180)
(1)求此抛物线的解析式;
(2)画出二次函数的图象;
(3)结合函数图象,回答以下问题.当x______时,y随x的增大而增大,最大值为______.
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【推荐2】已知二次函数
.
(1)求二次函数与
轴的交点坐标;
(2)求二次函数的对称轴和顶点坐标;
(3)写出y随x增大而减小时自变量x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e08baa2f6747c7800d84ca3878a07e0.png)
(1)求二次函数与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)求二次函数的对称轴和顶点坐标;
(3)写出y随x增大而减小时自变量x的取值范围.
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