Unions and intersections of sequences of sets

Use the following definitions to express each union or intersection given. You can use roster or set builder notation in your responses, but no set operations. A = {i, i, i} (Recall that for any number x, x = 1.) B = {x R: -ix1/i} C = {x R: -1/i x 1/i} (a) (b) (c) (d) (e) (f) ni-2 Ai U-2 Ai Bi U Bi nC; UD C =1