二次函数
的图象如图所示,下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2020/3/30/2430765813276672/2434019957473280/STEM/e61a9d34c9804f919f0b16812986ac47.png?resizew=116)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://img.xkw.com/dksih/QBM/2020/3/30/2430765813276672/2434019957473280/STEM/e61a9d34c9804f919f0b16812986ac47.png?resizew=116)
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更新时间:2020-04-09 10:41:16
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相似题推荐
单选题
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适中
(0.65)
【推荐1】二次函数
的图象如图所示,则一次函数
与反比例函数
在同一平面直角坐标系内的图象大致为( )
![](https://img.xkw.com/dksih/QBM/2021/2/25/2665659249344512/2671837913161728/STEM/5603fed6-2142-43ed-a930-38a0885fa578.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a46145fa9f3c49f4a7fe041880d31fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e24a433ac6dff3fe0100aa48ee8f15dd.png)
![](https://img.xkw.com/dksih/QBM/2021/2/25/2665659249344512/2671837913161728/STEM/5603fed6-2142-43ed-a930-38a0885fa578.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
单选题
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适中
(0.65)
【推荐2】已知二次函数
的图象如图所示,对称轴为直线
,且经过点
,下列结论中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/623afc24f2227004b0e1b3922dfb954b.png)
A.![]() | B.![]() |
C.![]() | D.当![]() |
您最近一年使用:0次
单选题
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适中
(0.65)
【推荐1】抛物线y=ax2+bx+c(a≠0)的部分图象如图所示,则下面结论中不正确的是( )
![](https://img.xkw.com/dksih/QBM/2019/12/12/2353408174030848/2353734934323202/STEM/bb75d3f0f5924ec89d638e49d5fd9d83.png?resizew=135)
![](https://img.xkw.com/dksih/QBM/2019/12/12/2353408174030848/2353734934323202/STEM/bb75d3f0f5924ec89d638e49d5fd9d83.png?resizew=135)
A.ac<0 |
B.2a+b=0 |
C.b2<4ac |
D.方程ax2+bx+c=0的根是﹣1,3 |
您最近一年使用:0次
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【推荐2】已知抛物线
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抛物线过原点;②
;③
;④抛物线的顶点坐标为
;⑤当
时,
随
增大而增大.其中结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/42bfe3b6-1180-4063-9eb3-72723e3bff5f.png?resizew=147)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e32f16d75ccb62a04970f861827fca.png)
①抛物线过原点;②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd2336e50c0afb3e8e73a6ea9070ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80e1cb37d995b99834922b27c322b201.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b006dcdcb2bbb65c6fb3d94b7e17926.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200849ce71f53c0321506e27de437b8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/42bfe3b6-1180-4063-9eb3-72723e3bff5f.png?resizew=147)
A.①②③ | B.③④⑤ | C.①③④ | D.①④⑤ |
您最近一年使用:0次
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适中
(0.65)
【推荐1】抛物线
的对称轴为直线
.若关于
的一元二次方程![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18a51d0654e9a94d4b336ebd2e549ffc.png)
(
为实数)在
的范围内有实数根,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6458de29ea411405a6a1ea84af71f29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18a51d0654e9a94d4b336ebd2e549ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f8703133bbe53b0a4b740f6e988463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334138e91cc3086a9aeb9dd752b6b4f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐2】二次函数
的图像的一部分如图所示.已知图像经过点
,其对称轴为直线
.下列结论:①
;②
,③
﹔④关于x的方程
的两根分别为
,3.上述结论中正确结论的个数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/28d0a0be-9ee8-4819-a2bc-743bea15995e.png?resizew=228)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77694c11ba40ec5c2fc4f6a05e31a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810961de0c2c5174c5be32e8e5b4bf21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb1beec07792cbfc2f46de2aa151c5d6.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/28d0a0be-9ee8-4819-a2bc-743bea15995e.png?resizew=228)
A.1个 | B.2个 | C.3个 | D.4个 |
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