如图,二次函数y=ax2+bx+c(a≠0)图象与x轴交于A,B两点,与y轴交于C点,且对称轴为x=1,点B坐标为(﹣1,0).则下面的四个结论:①abc>0;②b2﹣4ac>0;③当y<0时,x<﹣1或x>3;④3a+c=0.其中正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/31c7b31b-f916-421c-a378-c3b7fa548205.png?resizew=155)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/31c7b31b-f916-421c-a378-c3b7fa548205.png?resizew=155)
A.4个 | B.3个 | C.2个 | D.1个 |
更新时间:2022-02-10 23:49:15
|
相似题推荐
单选题
|
适中
(0.65)
名校
【推荐1】如图所示,抛物线
的对称轴为直线
,与
轴的一个交点坐标为
,
,其部分图象如图所示,下列结论:
①
;
②
;
③方程
的两个根是
,
;
④方程
有一个实根大于
;
⑤当
时,
随
增大而增大.
其中结论正确的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679353e656a54993c041ebd39ec7b31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc917f8dd29f5a5fcf4762052bb8fa73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72634560f134103c60b8cb3746d29c37.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c57c13cec08993ae8fde867008257c24.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84bf876d16eee410f475107cfa8e0707.png)
③方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7f7f8806b67df8ad7afc86ebece91f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad733b3e2a9bc4ec2aefd26bfbc67f3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5144c7847fd7a8c42016da068c9ec5f.png)
④方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
⑤当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db053b743c6ecbf87eb04fd8041b4c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
其中结论正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/24/9ae8883f-dfea-4b7f-bd26-f2aef10d913b.png?resizew=157)
A.4个 | B.3个 | C.2个 | D.1个 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】对于实数m,n,定义一种运算“※”:m※n=m2﹣mn﹣3.下列说法错误的是( )
A.0※1=﹣3 | B.方程x※2=0的根为x1=﹣1,x2=3 |
C.不等式组![]() | D.函数y=x※(﹣2)的顶点坐标是(1,﹣4) |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】如图,关于
的二次函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b2598472b132656e3aa56e5ff16ba8.png)
是常数且
的图象如图,则双曲线
和直线
在同一坐标系中大致是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b2598472b132656e3aa56e5ff16ba8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7e02567cc849cc2b47a1966d7de4e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9f6b20db84f52f2442a20bfa69ac36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26619cf4c58a183c78bbf1840a04dd22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/465f84e68cdc9331a9c9f392668ba8a1.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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
经过点
和
,则下列结论:①
;②
;③
;④
;⑤若双曲线
经过点
,则以
、
为根的一元二次方程是
.其中正确结论的个数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/e31b840a-1ff3-4eac-826a-5273be73901e.png?resizew=135)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec40ff4479edca2ed18b6cadb8db72f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b724e955f78d88ce2ffce1e1ffb8a3ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da68ff94b0877adb96abbc3e0fa52d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661d5d8b2344d1ad2b7bf1490b16191b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/170932c0d6156799d81b12a2748983ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f42b2a9736c8943106472a7398d2892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d991ef4839e548c0cab2332d1904af62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d763496adc2283674ee1113face12dff.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/e31b840a-1ff3-4eac-826a-5273be73901e.png?resizew=135)
A.2个 | B.3个 | C.4个 | D.5个 |
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
的图象如图所示,对称轴为
.下列结论中正确的是( )
![](https://img.xkw.com/dksih/QBM/2016/1/14/1573954544173056/1573954549555200/STEM/37267e8cff9445b78f04fe9fc4762eb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3836a000fa859cd496089c04468f4881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://img.xkw.com/dksih/QBM/2016/1/14/1573954544173056/1573954549555200/STEM/37267e8cff9445b78f04fe9fc4762eb0.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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
与
轴交于点
和
,与
轴交于点
.下列结论正确的为( )
![](https://img.xkw.com/dksih/QBM/2021/5/6/2715233727094784/2716806242902016/STEM/62498314-57cf-4db9-925a-14dc933f1f1e.png?resizew=241)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.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://img.xkw.com/dksih/QBM/2021/5/6/2715233727094784/2716806242902016/STEM/62498314-57cf-4db9-925a-14dc933f1f1e.png?resizew=241)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次