二次函数
的图象如图所示,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/b83f662f-e19a-4ef3-8e87-13f8cab59880.png?resizew=220)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/b83f662f-e19a-4ef3-8e87-13f8cab59880.png?resizew=220)
A.![]() | B.![]() |
C.![]() | D.![]() |
2020·广东深圳·二模 查看更多[4]
2020年广东省深圳市盐田区九年级二模数学试题湖南省长沙市天心区长郡教育集团2019-2020学年八年级下学期期末数学试题山西省2020-2021学年第一学期九年级期中质量评估试题·数学(人教版·公立)试题(已下线)【万唯原创】2021年河北面对面-小册子第三章 函数6~8
更新时间:2020-06-09 23:05:03
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【推荐1】如图,二次函数
的图象与
轴的一个交点坐标是
,对称轴为直线
,下列结论:①
;②
;③
;④当
时,
;⑤
.其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/e9f78075-d24e-4aa8-bcc9-09b20ecda2f0.png?resizew=146)
![](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/623afc24f2227004b0e1b3922dfb954b.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/aa285de4d015f208441ffe9a84bbd780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c5469918fc2803d9d5b2951b3296fa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b843858ba23012c724dea0c51d54a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d70009d48ea5ed5e20cc5eff3d557e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/e9f78075-d24e-4aa8-bcc9-09b20ecda2f0.png?resizew=146)
A.2 | B.3 | C.4 | D.5 |
您最近一年使用:0次
单选题
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较易
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【推荐2】已知二次函数
的图象如右图所示,对称轴为直线
,有下列结论:①
; ②
; ③
; ④当
时,y随x的增大而增大. 其中正确的有( ).
![](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/810961de0c2c5174c5be32e8e5b4bf21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/507e6b9a00d4fb19a94edfea061f82f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b843858ba23012c724dea0c51d54a3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/13/e6bf29c4-7286-4d47-9f6a-fee5786d7f5c.png?resizew=98)
A.4个 | B.3个 | C.2个 | D.1个 |
您最近一年使用:0次
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【推荐1】二次函数
(
)的图象如图所示,则下列结论中正确的有( )个
①
;②
;③函数的最大值为
;④当
时,
;⑤
时,
随
增大而减少
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810961de0c2c5174c5be32e8e5b4bf21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ae24688d4c45aad43e9af0b7bbfda6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a8f84f5de5d5fe7a643ddfb4ee243eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc65d6eb9b63f96d80b54ec9893aee8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da6d82d173ad18cc040e94c925b5ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.4 | B.3 | C.2 | D.1 |
您最近一年使用:0次
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【推荐2】如图,二次函数
的图象经过点
,对称轴是直线
,下列结论错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/dc1b1f0c-0182-4a93-b974-a06956a6d064.png?resizew=120)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/dc1b1f0c-0182-4a93-b974-a06956a6d064.png?resizew=120)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次