1 . 已知二次函数
是R上的偶函数,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/583092e098262aa554e227d8a5351c15.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/5b7e798e-ad9d-4373-8864-329e7173f785.png?resizew=242)
(1)求
的解析式,画出函数
的图像并写出它的单调区间,不需证明;
(2)当
时,解关于x的不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/583092e098262aa554e227d8a5351c15.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/5b7e798e-ad9d-4373-8864-329e7173f785.png?resizew=242)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6e28dbfcdd6fb66b9ff759be044287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca7dc3843724c7dfd0b503ad04e078da.png)
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2022高一·全国·专题练习
2 . 抛物线
与
轴交于(0,3)点.
(1)求出
的值并画出这条抛物线;
(2)求它与
轴的交点和抛物线顶点的坐标;
(3)
取什么值时,抛物线在
轴上方?
(4)
取什么值时,
的值随
值的增大而减小?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1be7c1888168829b95f01a02b65ae13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)求它与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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