已知函数 y=2sin( x 2 + π 3 ) (1)求函数 y=2sin( x 2 + π 3 ) 的周期,最大值及取得最大值时相应的x的集合; (2)指出函数 y=2sin( x 2 + π 3 ) 的图象是由函数y=sinx(x∈R)的图象经过怎样的变化而得到的.
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