解题方法
1 . 已知函数
的最小正周期为
.
(1)求
;
(2)将函数
的图象上各点的横坐标伸长为原来的2倍(纵坐标不变),再将得到的图象向左平移
个单位,得到函数
的图象,求
在
上最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09cea58aa1cc83eb2951f8200896d2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f5389990c3a0c5373f3bd9fb2454c9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
(2)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f786a5701dc1a8a015e8843c3360151b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea9f4ad8ba067196724a6c13e30ff8eb.png)
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2 . 定义运算
,函数
(其中
)的图像中相邻两个零点的距离是
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0e02900952635dbc28821f3e2f84ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f73076a63f2e5b190af6f956467672e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20b69099d2b74ffbb1f365e1468bd8fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
A.6 | B.4 | C.3 | D.2 |
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