(a) Lim f(x) [x -> -1(-)]
Since x is approaching -1 from below, then f(x) = 1/x^2 and the limit is 1/(-1)^2 = 1
(b) Lim f(x) [x -> 1(+)]
Since x is approaching 1 from above, then f(x) = x + 1 and the limit is 1 + 1 = 2
(c) Lim f(x) [x -> 2(-)]
Since x is approaching 2 from below, then f(x) = x + 1 and the limit is 2 + 1 = 3