1 . 已知函数
.
(1)求函数
的最小正周期与单调递减区间;
(2)若函数
的图象上的所有点的横坐标伸长到原来的
倍,所得的图象与直线
交点的横坐标由小到大依次是
、
、
、
、
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c778e6c516f80ff932a87bb04d8229d.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/387ce366fbc8fe696e953a30efc82cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f829d84769b2a4e4d9524b9f7a37371e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2741ca619df1d9ab3d9ced4c49142dc.png)
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2018-03-23更新
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2卷引用:福建省泉州市永春县第一中学2017-2018学年高二上学期期初考试数学(文)试题