如图,二次函数
(a≠0)图像的一部分与x轴相交于点(1,0),对称轴为直线x=-1,则有下列结论:①abc>0;②
;③若关于x的一元二次方程
(a≠0)的一根是3,则另一根是-5;④
(m为任意实数).其中正确结论的个数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/18/e86b0e9e-cdbd-4c28-8779-8c0fb5150e24.png?resizew=201)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc79c7d0cb15cec81ad4fdcdc671e63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f7de656bfe40e941caec9cd77ef01f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a0db70be7145f74c092d6561d447e6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/18/e86b0e9e-cdbd-4c28-8779-8c0fb5150e24.png?resizew=201)
A.1 | B.2 | C.3 | D.4 |
更新时间:2022-06-15 16:21:38
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【推荐1】如图,二次函数
的图像如图所示,下列结论:①
;②
;③一元二次方程
有两个不相等的实数根;④当
或
时,
.上述结论中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/e41085ac-2ddf-4cdc-b54d-6732eaf2b67c.png?resizew=178)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/466641c863b092b643caa81d1ec1e5b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c766352f0be38b719621052de92615bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aefcde6bd682aa3d3c73f44d8291515.png)
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A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】已知,点
,
,
在二次函数
图象上,则
,
,
的大小关系是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c5d57111dd825830d87e5a8ba28cf9e.png)
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A. ![]() | B. ![]() |
C. ![]() | D. ![]() |
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【推荐1】如图,二次函数
的图象与
轴交于
,
两点,与
轴负半轴交于点
,它的对称轴为直线
,则下列选项中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/9feef11e-357c-4a75-856f-9b3a2513e3c4.png?resizew=166)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/9feef11e-357c-4a75-856f-9b3a2513e3c4.png?resizew=166)
A.![]() | B.![]() |
C.![]() | D.当![]() ![]() ![]() |
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【推荐2】二次函数
的图象如图所示,有下列结论:①
,②
,③
,④
,正确的有( )
![](https://img.xkw.com/dksih/QBM/2021/6/21/2747775407472640/2747798063890432/STEM/d70e6b52-9454-424b-a8a3-7036fa5bbebc.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50b8c9d41649449d34d8a23f0b8cda66.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a395a7795e783b4596bef9775d02ed6f.png)
![](https://img.xkw.com/dksih/QBM/2021/6/21/2747775407472640/2747798063890432/STEM/d70e6b52-9454-424b-a8a3-7036fa5bbebc.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐1】下图是二次函数
的部分图象,图象过点
,对称轴为直线
,小亮观察图象,得出五条结论:①
;②
;③
;④当
时,
的值随
值的增大而增大;⑤
(
为任意实数).你认为其中正确结论的个数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/d3611620-4c46-4784-9527-7f8584c16e19.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
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【推荐2】已知函数
,当
时,自变量x等于1,函数值y有最大值1,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b71acf35bb0952c2abba601707d000c0.png)
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【推荐1】二次函数y=ax2+bx+c的部分对应值如表,则方程ax2+bx+c=0的解是( )
x | ﹣3 | ﹣2 | ﹣1 | 0 | 1 | 2 |
y | ﹣12 | ﹣5 | 0 | 3 | 4 | 3 |
A.x1=x2=﹣1 | B.x1=﹣1,x2=0 | C.x1=﹣1,x2=2 | D.x1=﹣1,x2=3 |
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【推荐2】若二次函数
的图象经过点(﹣1,0),则方程
的解为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d039de5bf810e3ff6b0b6096fa48d462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2250f1979ab82fcd0ba296c13026ed5.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
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