如图,抛物线
与x轴交于点A、B,顶点为C,对称轴为直线
,给出下列结论:①
;②若点C的坐标为
,则
的面积可以等于2;③
,
是抛物线上两点
,若
,则
;④若抛物线经过点
,则方程关于
的方程
的两根为-1,3,其中正确的结论有( )
![](https://img.xkw.com/dksih/QBM/2022/1/10/2897947898683392/2960869770346496/STEM/0ea63094-d958-42a1-8ef8-6a55dfd9ed96.png?resizew=159)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16de2d7f06346a0fc6b5d6822e746237.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/84b5f32c09caa0be0d4c33be07aa4530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ca13a93b5f401c0d39ba52b0cffcb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685e73f420b856ebf5eb4eda574a4fe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/254de3006b5b845c035f4e282fdb958d.png)
![](https://img.xkw.com/dksih/QBM/2022/1/10/2897947898683392/2960869770346496/STEM/0ea63094-d958-42a1-8ef8-6a55dfd9ed96.png?resizew=159)
A.1个 | B.2个 | C.3个 | D.4个 |
21-22九年级上·江苏盐城·期末 查看更多[2]
更新时间:2022-04-18 16:07:52
|
相似题推荐
单选题
|
适中
(0.65)
名校
【推荐1】已知一元二次方程的两根分别是3和
,则这个方程可以是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】若一元二次方程﹣3x2+6x+m=0的一个根为x1=3,则该方程的另一个根是( )
A.x2=﹣1 | B.x2=﹣3 | C.x2=﹣5 | D.x2=5 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】已知二次函数y=a(x+1)(x﹣m)(a≠0,1<m<2),当x<﹣1时,y随x的增大而增大,则下列结论正确的是( )
①当x>2时,y随x的增大而减小;
②若图象经过点(0,1),则﹣1<a<0;
③若(﹣2022,y1),(2022,y2)是函数图象上的两点,则yl<y2;
④若图象上两点
,
对一切正数n,总有y1>y2,则1<m
.
①当x>2时,y随x的增大而减小;
②若图象经过点(0,1),则﹣1<a<0;
③若(﹣2022,y1),(2022,y2)是函数图象上的两点,则yl<y2;
④若图象上两点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8e3430d3842dea64f1fcddcefca4da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda4eab37ffb235f034f88c361600fe6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/214e0cfeabbdf9c71f2db3ef7ffcf525.png)
A.①② | B.①③ | C.①②③ | D.①③④ |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】如图,抛物线
经过正方形
的三个顶点A,
,
,点
在
轴上,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3666050060fb25232784bb8ed3545ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/f384e98d574fa2676d61624285f88188.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/14/2e77df34-2315-47c1-8c63-f05aa1a9f3bb.png?resizew=140)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
真题
名校
【推荐1】如图是二次函数y=ax2+bx+c的图象,下列结论:①二次三项式ax2+bx+c的最大值为4;②4a+2b+c<0;③一元二次方程ax2+bx+c=1的两根之和为﹣1;④使y≤3成立的x的取值范围是x≥0.其中正确的个数有( ).
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】已知二次函数
的
与
的部分对应值如表:
根据表格中的信息,得到了如下的结论:
二次函数
可改写为
的形式
二次函数
的图象开口向下
关于
的一元二次方程
的两个根为
或![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
若
,则
为任意实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
其中所有正确的结论为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e83378050530428bd0218f6c090f5088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a12739df67379f58cb7e58a0eca4ba42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d8b8edd94bc4d5d517ec77e56800e41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e312f8471ee9a2cb31666ffc4e8a3727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
其中所有正确的结论为( )
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】如图,二次函数
的图象经过点A,B,C.现有以下结论:①抛物线开口向下;②当
时,y取最大值;③当
时,关于x的一元二次方程
必有两个不相等的实数根;④直线
经过点A,B,当
时,x的取值范围是
.正确的结论是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc90b02a4cd1425aabfc192b1cdee17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb2d34dca5b43b80af9df3db316ea134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9e658935eded7454d18db764d1a3f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4780a2cfa9e6fa295ca544b7d8d7665e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14432427c9d6cc2b155051460e27cff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a697e620e171c4f31ada1546457edf1c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/a6561192-8e98-475a-8641-9e72ca42e0a5.png?resizew=184)
A.①② | B.①②③ | C.①②③④ | D.②③④ |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】二次函数
图象的一部分如图所示,它与x轴的一交点为
,对称轴为直线
,则由图象可知,方程
的解是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/56e7ea26-ea03-4357-8e92-abb5c5f4f562.png?resizew=127)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fbdef5d0c05acbf63fa72fa85c5bb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/56e7ea26-ea03-4357-8e92-abb5c5f4f562.png?resizew=127)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次