已知二次函数
的图象如图所示,有下列4个结论 ①
;②
;③
;④
;其中正确的结论有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/755364e4-e6c4-4b9d-92fc-7b0c8c540245.png?resizew=173)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0366d5c07fffb5b6ed572479cdec253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58eee42c293680c5aec29dd618f12087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d271d84be2a49b33f7de2eef732d3d56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a52070ae191a289f0b302e5fe234235.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/222b4ffb7b0375a69730f598e7267280.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/755364e4-e6c4-4b9d-92fc-7b0c8c540245.png?resizew=173)
A.1个 | B.2个 | C.3个 | D.4个 |
2022九年级·浙江·专题练习 查看更多[1]
(已下线)第01讲 二次函数的概念、图象与性质(3大考点9种解题方法)-2022-2023学年九年级数学考试满分全攻略(浙教版)
更新时间:2022-10-23 08:38:22
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单选题
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适中
(0.65)
【推荐1】如图,二次函数
(
,
,
是常数,
)图象的一部分,与
轴的交点
在点
和
之间,对称轴是直线
,对于下列说法:
①
;②
;③
;④
(
为实数);⑤当
时,
,其中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c0573e2af8a0dc8c6a1c0af067a324f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb442fb1fe1a5d9768cf11c3e1b7ec5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f32326056c3ce77b90af0b7f9ebde9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa285de4d015f208441ffe9a84bbd780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da04f641c850a75a63031d5aed2e0625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/904a8f171edf754db19339d9f7148484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b843858ba23012c724dea0c51d54a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
A.2个 | B.3个 | C.4个 | D.5个 |
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
(
为常数,且
),给出如下结论:
函数图象一定经过第二、三、四象限;
函数图象一定不经过第一象限;
当
时,
随
的增大而增大;
当
时,
随
的增大而减小.
其中所有正确 结论的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5c5558c40061db9afcb6d54699cdc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac9eb4f13a6ec140f7050e8d7dde52c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d8b8edd94bc4d5d517ec77e56800e41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
其中
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐1】如图,抛物线
的开口向上,与y轴的交点在y轴的负半轴上,对称轴为直线
,下列判断中:①
;②
;③若
为定值,则该抛物线的顶点为定点;④若
,则抛物线一定同时经过点
和
.其中正确的结论序号为( )
![](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/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad29acf28ab96fb1604e80c743bd738f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8409329b550296446a936d97c491ca9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0915bd8610c2409dc4dfadfd7705c2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0481d24e2af1e0cd348732b9444d1dde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455ba3d3e46977fcbe5b71f8bb9df4be.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/14/2c4013de-291c-4998-ad4e-6652c7a76b14.png?resizew=186)
A.①③ | B.①④ | C.②③④ | D.①③④ |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】已知二次函数
的图象如图所示,有以下结论:①
;②
;③
;④
.正确结论的个数是( )
![](https://img.xkw.com/dksih/QBM/2021/10/21/2834204499419136/2835455197569024/STEM/bc1e5670-d050-4b05-be30-45672409635f.png?resizew=140)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a31d3ff0489fd0dec060f5f1cc30117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96ff1511f9d7985acf11bb803f1ef983.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50b8c9d41649449d34d8a23f0b8cda66.png)
![](https://img.xkw.com/dksih/QBM/2021/10/21/2834204499419136/2835455197569024/STEM/bc1e5670-d050-4b05-be30-45672409635f.png?resizew=140)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】如图,抛物线
和直线
都经过点
,抛物线的对称轴为
,那么下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/4c0ed18f-c3c1-4819-a2f8-0beee5cb4a57.png?resizew=166)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/4c0ed18f-c3c1-4819-a2f8-0beee5cb4a57.png?resizew=166)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
您最近一年使用:0次
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【推荐2】在平面直角坐标系中,已知二次函数
的图象如图所示,有下列
个结论:
;
;
;
;
.其中正确的结论有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcf3ebeb45fae0496b31e7a6714ab9bd.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f7997c836f434f10ddf01c71fac510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e13c084152f12ce3f69903228bbbf05.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次