15. (A) limx-+ 1 +1 (B) lim2-1 c2 -x41 x+1 does not exist (C) limx-1 ac2 - 20+1 cannot be calculated since x2 - x + 1 does not factor (D) none of the aboove. 16. Based on this graph of y = f(x) we conclude that (A) limx-to f (2) = 1 (B) limx-to f(2) = 0 (C) limx-o f (x) does not exist (D) lime-to f (x) = 0 or limx-to f (2) = 1