如图,抛物线
的对称轴是
,下列结论:①
;②
;③
;④方程
有解,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/4630bb948780be53bc73d9ddef875000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea840f210f9b5b839edb5d34ee2a4f83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55fcc5e791b52c719d669cd46a3b6add.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/8/d051849c-f72c-42ec-b7e1-b2dee5d7e0d7.png?resizew=190)
A.4个 | B.3个 | C.2个 | D.1个 |
更新时间:2023-06-08 08:51:25
|
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【推荐1】如图,抛物线
与
轴交于点
和点
,与
轴交于点
,则下列结论:①
;②当
时,
随
的增大而增大;③方程
有两个不相等的实数根;④
;其中正确的个数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/1/7c39b85a-28c4-4946-be47-80fc20012caf.png?resizew=111)
![](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/1c6ff81aedbefa935da289dc632e78eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d03fa28c117649b0fdfe17eed7b583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.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/1574048c0e3dfa66abfdaaae457c5459.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a03aede75a2767699d7ff25b37f336b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/1/7c39b85a-28c4-4946-be47-80fc20012caf.png?resizew=111)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】对称轴为直线
的抛物线
(a,b,c为常数,且
)如图,小明同学得出了以下结论:①
;②
;③
;④
;⑤
(m为任意实数);⑥当
时,y随x的增大而增大.其中结论错误的个数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/0beb5ccf-d75f-436e-b928-3d39c70c69cd.png?resizew=200)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](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/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/375386102cba5bfd93bdf340216eb22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad29acf28ab96fb1604e80c743bd738f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da04f641c850a75a63031d5aed2e0625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e551755d48c059760898baaa1b883625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da6d82d173ad18cc040e94c925b5ab9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/0beb5ccf-d75f-436e-b928-3d39c70c69cd.png?resizew=200)
A.1 | B.2 | C.3 | D.4 |
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【推荐1】如图二次函数
图象的一部分与x轴的一个交点坐标为
,对称轴为直线
,结合图象得出下列结论:①
且
;②
;③关于x的方程
的两根分别为
和1;④若点
均在二次函数图象上,则
:⑤
,其中正确的结论有( )个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff32d26c8d44f5fb4813a19c1030a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d5f0d374837655cc286d326305da36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e56f4504e0f80fd031c8b5f41832e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae8523dd6a189644e58a196e748049ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099cb36ebe576883857783aa58ac5bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b44c63a912c9f07b80fb8f5bdde7a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a395a7795e783b4596bef9775d02ed6f.png)
A.2 | B.3 | C.4 | D.5 |
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【推荐2】如图,已知二次函数
的图象与x轴分别相交于A,B两点,与y轴相交于点C,
,则由抛物线的特征判断以下结论:①
;②
;③
;④
,其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a23f35ebcd9799d82c1e41c09781a4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661d5d8b2344d1ad2b7bf1490b16191b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da68ff94b0877adb96abbc3e0fa52d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd9e1fcd03b65563659fe40d47dc3af1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/8864a80d-ae36-44ac-9d62-94a8b8b71371.png?resizew=178)
A.①③ | B.①②④ | C.①③④ | D.②③④ |
您最近一年使用:0次
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【推荐1】如图,二次函数
的图象过点
,对称轴是直线
.下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c6ed6a3b3056d3762d8a234d3a9d2a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcbcd0aebdd8bd688d108834747009f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/29/42b374b8-3bdf-4fdf-af5a-ff4d343a992c.png?resizew=106)
A.![]() | B.![]() |
C.![]() | D.若点![]() ![]() |
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【推荐2】如表是一组二次函数
的自变量和函数值的关系,那么方程
的一个近似根是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b800b7d6a688abf8a3018c133cec9e.png)
![]() | 1 | 2 | 3 | 4 |
![]() | ![]() | ![]() | 3 | 9 |
A.1.2 | B.2.3 | C.3.4 | D.4.5 |
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