1.判断f(x)=sin3x+│sin3x│是否为周期函数,并求出其最小正周期.2.已知f(x)=log1/2│sinx│.①求f(x)的定义域与值域 ②判断f(x)的周期性,若是周期函数,求周期 .3.设f(x)为定义(-∞,+∞)上的周期函数,

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