If  f(x) defined by f(x)=   

                                        1,x=0

                                        -1,x=1

then f(x) is continous for all x except x=0,1.how???????????

Please tell me what shud be our stategy to solve when we see mod values

Re:Continuity and differentiation (rates assured)

but hw did u gt d left hand limit for x=0 as -1 b'cauz f(x)=-1 is satisfied for values (-infinity,0) and (1,infinity) as well, means values greater than 0 also.