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सिद्ध कीजिए कि फलन f(x)={{:(xtan^(-1).(1...

सिद्ध कीजिए कि फलन `f(x)={{:(xtan^(-1).(1)/(x)",",xne0,),(0",",x=0):}` x = 0 पर संतत है पर अवकलनीय नहीं है|

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