已知二次函数
的图象如图所示,则下列结论:①
;②
;③当
时,
:④方程![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f33eaeb59d80b26a0c1f9c700ad2f0.png)
有两个大于-1的实数根.其中正确的是( )
![](https://img.xkw.com/dksih/QBM/2020/2/16/2400372914708480/2401165529112576/STEM/3ded658bb72a4b33b2ae44384e2ee83c.png?resizew=100)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe6337d68cd5653767e3a1889b8b2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4944b18a1daae0480089124e5551107f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4630bb948780be53bc73d9ddef875000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a57458464618fcf619375a93d3c66d69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f33eaeb59d80b26a0c1f9c700ad2f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e9612c99b30db7eca0dcae4bddc808.png)
![](https://img.xkw.com/dksih/QBM/2020/2/16/2400372914708480/2401165529112576/STEM/3ded658bb72a4b33b2ae44384e2ee83c.png?resizew=100)
A.①②③ | B.①②④ | C.②③④ | D.①③④ |
更新时间:2020-02-17 21:26:41
|
【知识点】 二次函数图象与各项系数符号解读
相似题推荐
单选题
|
适中
(0.65)
【推荐1】已知二次函数y=ax2+bx+c(a≠0,a、b、c为常数)的图象如图所示,下列5个结论:①abc<0;②b<a+c;③4a+2b+c>0;④c<4b;⑤a+b<k(ka+b)(k为常数,且k≠1).其中正确的结论有( ) ![](https://img.xkw.com/dksih/QBM/2018/2/9/1878701252993024/1880490681901056/STEM/0b72d24f17fb4b1382dcdb225fa7044e.png?resizew=156)
![](https://img.xkw.com/dksih/QBM/2018/2/9/1878701252993024/1880490681901056/STEM/0b72d24f17fb4b1382dcdb225fa7044e.png?resizew=156)
A.2个 | B.3个 | C.4个 | D.5个 |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】如图是二次函数
(a,b,c是常数,
)图象的一部分,与x轴的交点在点
和
之间,对称轴是
.对于下列说法:①
;②
;③当
时,
;④
.其中正确的个数是( )
![](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/4c0573e2af8a0dc8c6a1c0af067a324f.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/94ed37ee7432002cd0e0978b2012e184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbbcf3f7721240b8d2161f8c66a0fcf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b843858ba23012c724dea0c51d54a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea840f210f9b5b839edb5d34ee2a4f83.png)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次