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An Intiative by Sri Chaitanya
a
0
,1
,2
,3
b
Number of points where the function 
([.] denotes the greatest integer function) { } denotes fractional part of x and f(1) = 0 is continuous but non differentiable
The number of points at which 
is not differentiable where 
is
Number of points where tangent does not exist for the curve y = sgn(x2 –1)
answer is A, B, C.
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