REMOVABLE DISCONTINUITY

Sometimes a function " f " is not defined at "c" or f(c) is defined in such a way that lim f(x) as x tends to c is not equal to f(c).

Then this discontinuity at c can be removed by defining f(c) in such a way that  c  f(x)= f(c).

Such a discontinuity is called removable discontinuity.