Question 1: Does the title explain the limitations of f(0)? The period of f(x) is 6, and f (2010) = f (0) =1/2;

Question 2: Discuss x >； by classification; 0, x=0, x< can get 0: a = 4;

Question 3: Are we talking about monotonicity of f(x) or monotonicity of F(X)?

The monotonicity of F(X) is:

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