\( f(x)=\frac{\tan \mid \pi[x-\pi]}{1+[x]^{2}} \) (A) discontinuous at some \( x \) (B) continuo...
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0\( f(x)=\frac{\tan \mid \pi[x-\pi]}{1+[x]^{2}} \)
(A) discontinuous at some \( x \)
(B) continuous atall \( x \), but \( f^{\prime}(x) \) does not exist for some \( x \)
(C) \( f^{\prime}(x) \) exists for all \( x \), but \( f^{\prime \prime}(x) \) does not exist
(D) \( f^{\prime}(x) \) exists for all \( x \)
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