已知抛物线
(
、
、
为常数,且
)的对称轴为
,与
轴交于
、
两点,若
,则下列结论正确的是( )
![](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/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ec3d75e53b990bc8f9a4622928dd21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b583230a32b774445332490c511989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a79303098aa255f4bf321752a5ad9bbc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-05-11 09:32:03
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【推荐1】对于任意的实数m、n,定义符号
的含义为m,n之间的最大值,如
,
.定义一个新函数:
,则
时,x的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0396c790d7973706828ff8f8ff5bcaf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1b6202fa49a69eea1d0b04ce02b6674.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/129643d878dbd141ca07497576f549b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f374ca6586335743672829084d1ea7a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d97c5dd615b7752e1eb6c139891f54.png)
A.![]() ![]() | B.![]() ![]() | C.![]() | D.![]() ![]() |
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【推荐2】已知二次函数
(
为常数,
),点
是该函数图象上一点,当
时,
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ccc9574b20406237bc877952602f5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baedc4d7e690ab3f7d80d30ba0a9efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ceb9e316dd913d356b0c9921f32e62d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752b3432f062c2f17237cfcb4c2ee2fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a30f85df189500c289ce4cafbc57fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() ![]() | B.![]() |
C.![]() ![]() | D.![]() |
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【推荐1】小强从如图所示的二次函数
的图象中,观察得出了下面五条信息:(1)
;(2)
;(3)
;(4)
;(5)
. 你认为其中正确信息的个数有( )
![](https://img.xkw.com/dksih/QBM/2015/3/20/1578611287883776/1578611288129536/STEM/dcbf19af7edf48778adced46f3000673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90bc334305133ac2b4b8d21efeb3324c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c355ca02faac63856e08b2e741451b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229d55eeae0ce82c467bd1e5686d8ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05ae918a90fd3500c30bf38c0e34b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58c7de0dba3ebdb1478acb11b14c9492.png)
![](https://img.xkw.com/dksih/QBM/2015/3/20/1578611287883776/1578611288129536/STEM/dcbf19af7edf48778adced46f3000673.png)
A.2个 | B.3个 | C.4个 | D.5个 |
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【推荐2】如图,已知二次函数
的图象与
轴交于点
,对称轴为直线
,下列结论:①
;②
;③
;④
(
是任意实数);⑤c-a<-1,其中正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/7/13/2763349981249536/2799386574864384/STEM/1710c2ac-8d3c-4bbd-bd29-3857277dbe3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30335ad79469438ba37de62e3e7096c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11e27b42a96427cdc800bf87b90f28c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84fbceb31f23d5aed2d178d4d407f751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd1447c47c0695dbc68118709b42ac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/2021/7/13/2763349981249536/2799386574864384/STEM/1710c2ac-8d3c-4bbd-bd29-3857277dbe3c.png)
A.①②![]() | B.②③ | C.①②③![]() | D.②③④ |
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【推荐1】如图,抛物线
的图象经过点
,与
轴交点的横坐标分别为
,其中
,则下列结论中正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/1/16/2637200210165760/2644526531895296/STEM/5c4942aca7b44fc0a5bdc7f62c9073bc.png?resizew=169)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/990a64c41f96ef4355bf4ae017143f99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9e8bd484b0db54a479c3827355bb6ca.png)
![](https://img.xkw.com/dksih/QBM/2021/1/16/2637200210165760/2644526531895296/STEM/5c4942aca7b44fc0a5bdc7f62c9073bc.png?resizew=169)
A.![]() | B.![]() |
C.![]() | D.k为任意实数,关于x的方程![]() |
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【推荐2】已知二次函数y=ax2+bx+c的顶点D(-1,2),与x轴的一个交点A在(-3,0)和(-2,0)之间(不含端点),如图所示,有以下结论:①b2-4ac>0;②a+b+c<0;③c-a=2;④方程ax2+bx+c-2=0有两个相等的实数根,其中结论正确的个数有( )
![](https://img.xkw.com/dksih/QBM/2021/1/29/2646771069698048/2648891647852544/STEM/8802578f-de84-4099-bf4d-0ac2dbf04fa9.png)
![](https://img.xkw.com/dksih/QBM/2021/1/29/2646771069698048/2648891647852544/STEM/8802578f-de84-4099-bf4d-0ac2dbf04fa9.png)
A.1个 | B.2 个 | C.3个 | D.4个 |
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