如图,二次函数
的图象经过点
,对称轴为直线
,下列结论:①
;②
;③
;④若
两点在该二次函数的图象上,则
.其中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb442fb1fe1a5d9768cf11c3e1b7ec5b.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/540a408fa8e480416855df9647c27203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acfb45557927f5792e4fcc1c2d610e2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812167ecae20913be5e2bbc00e3eca1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25e564ecc5c2b36c61d0a591bc8268b6.png)
A.1个 | B.2个 | C.3个 | D.4个 |
更新时间:2024-04-18 18:20:24
|
相似题推荐
单选题
|
适中
(0.65)
名校
【推荐1】如图为二次函数y=ax2+bx+c的图象,给出下列说法:①ab<0;②方程ax2+bx+c=0的根为x1=-1,x2=3;③a+b+c>0;④当x<1时,y随x值的增大而增大;⑤当y>0时,x<-1或x>3.其中,正确的说法有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/17/6b9816ce-34ad-41b4-bb91-8c66836baa4d.png?resizew=145)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】方程和函数之间互相联系,方程根的问题通常可以转化为函数图象公共点问题来解决:已知
,若关于x的方程
有三个不相等的实数根,则实数k的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00d3e873181a363771b98a41061dd3a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52bfe339260ac1996831518fc93b4b4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】如图是二次函数
图象的一部分,图象过点
和点
,对称轴为直线
,则下列说法:①
;②当
时,函数
随
的增大而增大;③当
时,
的取值范围是
;④函数的最大值为4.其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97b3c94d505e7c5bcce94afec4af3d92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fed700b7a3ab2ee7fbae12507033af9.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/7ccaa6e503b61e9ae78d8439cba2e328.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/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334138e91cc3086a9aeb9dd752b6b4f3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/efe616f5-d996-45e1-8df0-4ab42bfb6e0b.png?resizew=150)
A.①②③ | B.①②④ | C.①③④ | D.②③④ |
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
(
)与x轴的一个交点为
,其对称轴为直线
,其部分图象如图所示,有下列5个结论:①
;②
;③
;④
;⑤若关于x的方程
有两个实数根
,且满足
,则
,
.其中正确结论的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cfa2a6d9749a619edf80bad8b3e4962.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/c9deb79d044a379f31a8fc57736d7ead.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11e27b42a96427cdc800bf87b90f28c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0583be641ff02e7e7a82ee0413d1dc8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7962bd071b3df4a2a98c2be99f74350c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a40d7f543bc03518809f2c0037c9c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23cb5c1e146a4b724c2d9a1c013bd323.png)
A.5 | B.4 | C.3 | D.2 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】如图,二次函数
的大致图象,关于该二次函数下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/2/25/2924150104842240/2963522703736832/STEM/58b20814-fb17-4dbc-bfeb-e6933870d627.png?resizew=220)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41be56f0b919a1c7c9279d9f5116d451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229daf365df875f79e83cd7a84d65e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0b3aa5c997dd53bbb22b7e9c11ace5b.png)
![](https://img.xkw.com/dksih/QBM/2022/2/25/2924150104842240/2963522703736832/STEM/58b20814-fb17-4dbc-bfeb-e6933870d627.png?resizew=220)
A.![]() ![]() ![]() | B.![]() ![]() ![]() |
C.当![]() ![]() ![]() | D.当![]() ![]() ![]() ![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】二次函数
为常数,
中的
与
的部分对应值如表:
当
时,给出下列四个结论:①
;②当
时,
的值随
值的增大而增大;③
;④当
时,关于
的一元二次方程
的解是
,
,其中正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0166102d801cc1bb81c15f4e212e91ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f28b08682efa2692b052f64fe1448fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e489645a4930d59e21720c0c44ac318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0aa2ef928b6e3341d0a0dc6d8055b9.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/52018c26122b8d881f2625bc873f82d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aff29c8a6b12deddb514c9e92d92c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4049b329e8cf711663e050e0dc9cdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e4fd085ee10f340a008389c4a1a80d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次