已知电流I与时间t的关系式为.                         

已知电流I与时间t的关系式为

                                      

(1)右图是(ω>0

在一个周期内的图象,根据图中数据求

的解析式;

(2)如果t在任意一段秒的时间内,电流都能取得最大值和最小值,那么ω的最小正整数值是多少?

答案

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