已知二次函数
图象如图,下列结论:①
;②
;③
;④
;⑤当
时,y随x的增大而减小.其中正确的结论序号是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0949ce24c868813dfba767b6fb277538.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd2336e50c0afb3e8e73a6ea9070ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f097626288a034e4984d5bee390968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/16/8c84a3b2-8002-4a50-9eda-afb3ccd495cd.png?resizew=211)
更新时间:2023-10-16 22:00:11
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【推荐1】已知点A(
,10),B(
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【推荐2】二次函数y=x2-3x+2的图象不经过第_______ 象限.
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【推荐1】现从四个数1,2,
,
中任意选出两个不同的数,分别作为二次函数
中a,b的值,则所得二次函数满足开口方向向下且对称轴在y轴右侧的概率是__________ .
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【推荐2】已知抛物线
开口向上,抛物线
开口向下,且抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44879e5444f746e4dab11f0409c997d2.png)
比抛物线
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【推荐1】下列关于抛物线
为常数,且
的四个结论:
①若
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没有公共点;
②若
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③若抛物线与
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/871cb4dc32cc8be007afc385daf70b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e464a3586f84fcdf7d221619f8018144.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f590ca2bde213675bffe68ed4017f957.png)
②若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
③若抛物线与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2c84e7b41a841a230ed5f8a42309aa.png)
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④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
其中正确的结论是
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【推荐2】二次函数
=
的部分图象如图,图象过点
,对称轴为直线
=2,下列结论:①
bc<0;②
=
;③
;④
(
为任意实数);⑤当
时,
的值随
值的增大而增大;其中正确的结论有___________ (填序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e600c20cd4be3321dc5ea832833d1aeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
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