(5.2) Each of the following expressions defines a function whose domain is whole of R except finitely many exceptions. In each case find the exceptional point(s) and discuss the type of discontinuity exhibited. (5.2.1) f(x) = cos(-). I sin(x-3) (5.2.2) f(x) + x = 3; = I- 3 0, x = 3. x-2 (5.2.3) f(x) = T 2