如图,抛物线
与x轴的一个交点在
,和
之间,其对称轴为直线
,则下列结论:①
;②
;③
;④
;⑤若
,
是该抛物线上.的点,则
,其中结论正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/ac01ec27-4d6e-47af-8016-98255aa6847d.png?resizew=108)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74184524c9d7551ad45f96737cb65834.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd243fab0af865af67a2ab817e909cf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbbcf3f7721240b8d2161f8c66a0fcf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4630bb948780be53bc73d9ddef875000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e7ef804eeb23618fbf91ead47587f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccbc02110922dc91aab0d325b62bb57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbdc6e14577fbcc8fd26ad13faff3c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/ac01ec27-4d6e-47af-8016-98255aa6847d.png?resizew=108)
A.2个 | B.3个 | C.4个 | D.5个 |
更新时间:2023-12-17 19:25:39
|
相似题推荐
单选题
|
适中
(0.65)
【推荐2】抛物线
上部分点的横坐标x和纵坐标y的对应值如下表,下列说法正确的有( ).
①当
时,y随x的增大而减小; ②抛物线的对称轴为直线
;
③当
时,
; ④方程
的一个正数解
满足
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
x | … | 0 | 1 | … | ||||
y | … | 3 | 3 | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b650820d7bed48ed67a2869ad8c65ff1.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/806c0ee9c41c0accc711dd325aefa26f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de1be6798f6f5497315b6a746acbfd34.png)
A.①② | B.①②③ | C.②③④ | D.①②④ |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐1】如图,抛物线
的对称轴为
,且过点(
,
),有下列结论:①
; ②
;③
;④
;其中正确的结论有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ee0c1d832ebd3aafdafbb01cbce6860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/986fa21fcfb02427a7736fdedb25dc13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1671a1e7ff826267fc1459801886699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50968578ee21e47ca0d4173fec00ca10.png)
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】如图,抛物线
的图象与x轴交于
,
,其中
.有下列五个结论:①
;②
;③
;④
;⑤若m,
为关于x的一元二次方程
的两个根,则
.其中正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc8350b12974ffc8d06fce36d158f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe622d63eb6d0d9568e4ef85deff47e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d5b159da139b50cde0d087f462aa4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da68ff94b0877adb96abbc3e0fa52d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/396a001f5e3e6089207575ed84939fca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73fc8af7b9b47aba5db3e40a32a1aeb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3484588665d34c47ac3d2ef5c7ef5f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8fd708e569b012f602b4363ef0a78e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8ccf66f6873c432436f39c2d8111346.png)
A.4 | B.3 | C.2 | D.1 |
您最近一年使用:0次
单选题
|
适中
(0.65)
真题
【推荐1】如图,二次函数y=ax2+bx+c(a≠0)的图象与x轴交于A、B两点,与y轴交于点C,点B坐标(﹣1,0),下面的四个结论:①OA=3;②a+b+c<0;③ac>0;④b2﹣4ac>0.其中正确的结论是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/17/461ccc41-2c08-43a3-8d64-9ad176cde83b.png?resizew=176)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/17/461ccc41-2c08-43a3-8d64-9ad176cde83b.png?resizew=176)
A.①④ | B.①③ | C.②④ | D.①② |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,二次函数
的图象与x轴的交点的横坐标分别为
,3,则下列结论:①
;②
;③
;④对于任意x均有
.正确的有( )个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4944b18a1daae0480089124e5551107f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa285de4d015f208441ffe9a84bbd780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810961de0c2c5174c5be32e8e5b4bf21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fce5a20b0e8629b4d1e86d065f2affea.png)
A.1 | B.2 |
C.3 | D.4 |
您最近一年使用:0次