Which of the following functions have finite number of points of discontinuity? (where \[[\cdot ]\]represents greatest integer functions)

\[x\text{ }\!\![\!\!\text{ }x]\]

Which of the following functions have finite number of points of disco

1.	Which of the following functions have finite number of points of discontinuity? (where \[[\cdot ]\]represents greatest integer functions)
A.	\[tan\,x\]
B.	\[x\text{ }\!\![\!\!\text{ }x]\]
C.	\[\frac{\left\| x \right\|}{x}\]
D.	\[\sin \,[n\pi x]\]
Answer» D. \[\sin \,[n\pi x]\]

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Which of the following functions have finite number of points of discontinuity? (where \[[\cdot ]\]represents greatest integer functions)

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