If is a function defined by , where denotes the greatese integer function, then is :
Option: 1 discontinuous at all integral values of x except a x=1
Option: 2 Continuous only at x=1
Option: 3 disontinuous only at x=1
Option: 4 Continuous for every real x
Doubtful points are x = n,
Hence f(x) is continous for all values of x
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