如图,抛物线
交x轴于点
和
,交y轴于点C,抛物线的顶点为D.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/3d9024ca-967a-48e7-b5cd-6c928181d79d.png?resizew=171)
(1)当
时,求b的值.
(2)抛物线上有两点
和
,若
,且
,比较
的大小关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073fdb4c75c4285885598bc3a66f3699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7799d713e6f2be4cb542b0372916a25e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/552a77a57b08d26bc38e31b653c194dd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/3d9024ca-967a-48e7-b5cd-6c928181d79d.png?resizew=171)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
(2)抛物线上有两点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e2cf2dcff587a5a1fcdbb8ed9eab3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba184e4720bf1ca1fb88a80c588842a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4378ddbb895755fb1d06e10fbcdeb065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5961fe2d5223d409c37aaddb5513cbc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21413bb0e5ef542ce03de2e0d3f8f67e.png)
更新时间:2022-12-10 17:49:54
|
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解答题-作图题
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适中
(0.65)
【推荐1】已知直线y=x+3分别交x轴和y轴于点A和B,抛物线y=ax2+bx+c经过点A和B,且抛物线的对称轴为直线x=﹣2.
(1)抛物线与x轴的另一个交点C的坐标为 ;
(2)试确定抛物线的解析式;
(3)在同一平面直角坐标系中分别画出两个函数的图象(请用2B铅笔或黑色水笔加黑加粗),观察图象,写出二次函数值小于一次函数值的自变量x的取值范围 .
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/24dd7b94-2e79-4b37-b42f-e6e8def4e0f3.png?resizew=164)
(1)抛物线与x轴的另一个交点C的坐标为 ;
(2)试确定抛物线的解析式;
(3)在同一平面直角坐标系中分别画出两个函数的图象(请用2B铅笔或黑色水笔加黑加粗),观察图象,写出二次函数值小于一次函数值的自变量x的取值范围 .
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解答题-问答题
|
适中
(0.65)
【推荐2】(1)解方程:
.
(2)已知抛物线的顶点是
,且经过点
,求该抛物线的函数表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e5b73e1335d155c1353af07982a062f.png)
(2)已知抛物线的顶点是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b85e56104dd18b4a0c78e05face504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4065ed9c98391f4cfe89319b6e65b44f.png)
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解答题-问答题
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适中
(0.65)
【推荐1】在平面直角坐标系
中,
,
是抛物线
上任意两点,其中
.
(1)若抛物线经过点
,
①求抛物线的对称轴;
②当
时,比较
,
的大小,并说明理由;
(2)设抛物线的对称轴为直线
,若存在实数m,当
时,
,
,都有
,直接写出a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8198c3b302b3820e86763428eb1e91cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3463ced6030af957f13f9ba05b977c1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d92dc7f59572fc5aeba24c37ef09a3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
(1)若抛物线经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0175d6616856874867a3ae7263e30635.png)
①求抛物线的对称轴;
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/574824d85f44d42246529ac135c0391c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
(2)设抛物线的对称轴为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6f7b16d65f1b2b8bea8cf4a83fde925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ea25d82d71ce64e512886b0d11a915b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bb39135ed8802263d9846d54a71f4d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180c2cdf1cdd76d6bf4e1af663eb7758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05f6760940c3f76823e98b48d65bdec9.png)
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解答题-问答题
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适中
(0.65)
【推荐2】如图,在平面直角坐标系中,二次函数
的图象与
轴交于点A、
(点A在点
的左侧),与
轴交于点
,过其顶点
作直线
轴,垂足为
,连结
、
.
(1)求点A、
、
的坐标;
(2)若
与
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的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f63a94f1a194000bbe600a4024fa2805.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c99ec9f6a0bec41cb7f0da2d272c26d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/19/e6fa6079-0d24-4731-9f23-feb791f6a35b.png?resizew=133)
(1)求点A、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372629a8666de1e9bac3e7daadcac7b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4234cf4d8159f5df0333bcc269ffe099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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