已知二次函数y1=ax2+2
x+b与y2=bx2+2
x+a(a≠b)图象开口朝上.
(1)若a=1,当x取何值时y1随x的增大而减小;
(2)若y1与y2的图象有两个交点为A、B,请求出这两个交点的横坐标;
(3)记y1与y2的最小值分别为m、n.若m>0,n>0,且mn=4,求ab的值..
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)若a=1,当x取何值时y1随x的增大而减小;
(2)若y1与y2的图象有两个交点为A、B,请求出这两个交点的横坐标;
(3)记y1与y2的最小值分别为m、n.若m>0,n>0,且mn=4,求ab的值..
更新时间:2022-03-30 12:40:56
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(1)求出抛物线的解析式;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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【推荐2】已知直线y1=kx+1(k>0)与抛物线y2=
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