名校
1 . 已知
,函数
.
![](https://img.xkw.com/dksih/QBM/2019/11/28/2343659661434880/2344438805454848/STEM/7cd66e253c4c479aa2a17ce8ecfc9f75.png?resizew=357)
(1)当
时,在给出的坐标系中,画出函数
的大致图象,根据图象写出函数
的单调减区间;
(2)讨论关于
的方程
解的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce5db51e4fe5e40b38cbc3822c9b8ce9.png)
![](https://img.xkw.com/dksih/QBM/2019/11/28/2343659661434880/2344438805454848/STEM/7cd66e253c4c479aa2a17ce8ecfc9f75.png?resizew=357)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)讨论关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6e39a839bbcd0a60be36d76ca594237.png)
您最近一年使用:0次
12-13高一上·广东广州·期末
2 . 如图,
是边长为2的正三角形,记
位于直线
左侧的图形的面积为
.
![](https://img.xkw.com/dksih/QBM/2012/2/6/1570717257007104/1570717262675968/STEM/572894eba2954c0e8b605770d7f9ebfc.png?resizew=137)
(1)求函数
解析式;
(2)画出函数
的图像;
(3)当函数
有且只有一个零点时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c6492ac870d4fdeee5bc2f9af58abe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c6492ac870d4fdeee5bc2f9af58abe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83635a6f453f357a41891d8c6479451e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5c03ebff0ac915599e680e38a875e7.png)
![](https://img.xkw.com/dksih/QBM/2012/2/6/1570717257007104/1570717262675968/STEM/572894eba2954c0e8b605770d7f9ebfc.png?resizew=137)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5c03ebff0ac915599e680e38a875e7.png)
(2)画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b793f4b3980348c0d679bfc8935683e.png)
(3)当函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587738aff4fde545ec3fd2ad5fe9d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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