Let fi: R R ХH O 1, if x EQ 0, if ERQ f2: R R XH Prove that (a) lima f1(x) does not exist for any a E R. (b) lim, a f2(x) does not exist for any a ER\ {0}. (c) lim 0 f2(x) = 0 Continue to next pag- if xEQ 0, if x ER\Q