Let \( f(x)=\cos 2 \pi x+x-[x]([ \).\( ] denotes the greatest integer function). Then, number of...

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Let \( f(x)=\cos 2 \pi x+x-[x]([ \).\( ] denotes the greatest integer function). Then, number of points in [0,10] \) at which \( f(x) \) assumes its local maximum value, is
(a) 0
(b) 10
(c) 9
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