如图,二次函数
的图象与
轴相交于
,
两点,对称轴是直线
,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d57173ef4cd72eb270686875dfd623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
A.![]() | B.![]() | C.点![]() ![]() | D.当![]() ![]() ![]() |
更新时间:2024-04-03 09:20:05
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相似题推荐
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【推荐1】已知二次函数
的图象如图所示,给出以下结论:
①因为
,所以函数
有最大值;②该函数的图象关于直线
对称;③
;④当
或
时,函数
的值都等于
.
其中正确结论的个数是( )
![](https://img.xkw.com/dksih/QBM/2018/10/30/2064850959933440/2068785288134656/STEM/07cbfe53e7a84666b1207aad237bc470.png?resizew=97)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f51c8c8a7936453b45151cf432a4314e.png)
①因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae018fde08edf0539089f98c17e11ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589a4d5f5fb135a3144644595774b896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c33ff208ad6ce4ea97767b0e5d1bcad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24182842f4e8bf4340826443774d021.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/c95b6be4554f03bf496092f1acdfbb89.png)
其中正确结论的个数是( )
![](https://img.xkw.com/dksih/QBM/2018/10/30/2064850959933440/2068785288134656/STEM/07cbfe53e7a84666b1207aad237bc470.png?resizew=97)
A.4 | B.3 | C.2 | D.1 |
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【推荐2】若关于x的二次函数
,当
时,y随着x的增大而减小,且关于x的分式方程
有正数解,那么所有满足条件的整数a的值有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc43eaefeaa6ad55d23da40913aced7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd882fe096a6fd3586438c89e37871f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27fde848072b30a2620bc097ac53a62f.png)
A.6个 | B.5个 | C.4个 | D.3个 |
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【推荐1】已知抛物线
的对称轴为直线
,与x轴的一个交点坐标
,其部分图象如图所示,下列结论:
抛物线过原点;
;
;
抛物线的顶点坐标为
;
当
时,y随x增大而增大
其中结论正确的是
![](https://img.xkw.com/dksih/QBM/2019/1/4/2111681959829504/2115290836459520/STEM/740be7c78cc94fec9e8a6814a23433f2.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ed24bfcc37b79fe9ca61ed8fdf26ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f8e60bdcb82a5d9ba4b2c9ad2c79f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a307510481425f92ef5799cd5dbb7ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d8b8edd94bc4d5d517ec77e56800e41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91ab4021fbd72b6758c37b599ea74df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de7958890f35a4e42c700044a9c4c87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ccaa6e503b61e9ae78d8439cba2e328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://img.xkw.com/dksih/QBM/2019/1/4/2111681959829504/2115290836459520/STEM/740be7c78cc94fec9e8a6814a23433f2.png?resizew=164)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】已知二次函数y=ax2+bx+c的图象与x轴交于点(−2,0),(x1,0),且1<x1<2,与y轴的正半轴的交点在(0,2)的下方,下列结论正确的是( )
①4a−2b+c=0
②a<b<0
③2a+c>0
④2a−b+1>0.
①4a−2b+c=0
②a<b<0
③2a+c>0
④2a−b+1>0.
A.①②③ | B.②③④ | C.①③④ | D.①②③④ |
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【推荐1】二次函数
的图象如图所示,下列结论:①
;
②
;③m为任意实数,则
;④
;⑤若
,且
,则
.其中正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/f7509ac5-b7b8-4ab1-90f3-ff5032d6fb51.png?resizew=146)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa285de4d015f208441ffe9a84bbd780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c024a97cff31cb54b6026300808798.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da68ff94b0877adb96abbc3e0fa52d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3db89b082e6ae7e75951b23a3bf4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/419504736c4934f6e0df4114c3743944.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/f7509ac5-b7b8-4ab1-90f3-ff5032d6fb51.png?resizew=146)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】抛物线
与x轴的一个交点为
,
,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ddedee48ca73635bad44bacb770193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9df2062940530232ab124a571e951ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a79303098aa255f4bf321752a5ad9bbc.png)
A.对称轴为直线![]() |
B.当![]() |
C.![]() |
D.方程![]() |
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