Which of the following functions is periodic? (A) \( f(x)=x-[x] \), where \( [x] \) denotes the ...
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0Which of the following functions is periodic?
(A) \( f(x)=x-[x] \), where \( [x] \) denotes the largest integer less than or equal to the real number \( x \)
(B) \( f(x)=\sin \frac{1}{x} \) for \( x \neq 0, f(0)=0 \)
(C) \( f(x)=x \cos x \)
(D) None of these
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