题型:填空题
难度:0.65
引用次数:224
题号:9095605
二次函数y=ax2+bx+c的图象如图所示,对称轴是直线x=1.下列结论:①abc<0;②3a+c>0;③(a+c)2﹣b2<0;④a+b≤m(am+b)(m为实数).其中结论正确的有_______ .(填所以正确的序号)
![](https://img.xkw.com/dksih/QBM/2019/12/5/2348584372568064/2350005532246016/STEM/d694935e0d6b4d9dbf66d66182a906d7.png?resizew=134)
更新时间:2019-12-07 06:41:24
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【知识点】 y=ax²+bx+c的图象与性质解读
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【推荐1】已知抛物线y=ax2+bx+c(a≠0)过以下三个点:(m,n),(m+2,2n),和(m+6,n),当抛物线上另有点的横坐标为m+4时,它的纵坐标为_____ ;当横坐标为m﹣2时,它的纵坐标为_____ .
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【推荐2】在平面直角坐标系中,
为坐标原点,抛物线
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作
轴的平行线交抛物线于点
,抛物线顶点为
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交直线
于点
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的值为______ .
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