okigbo Master | Next Rank: 500 Posts View User Profile Posts: 177 Joined: Sun Aug 02, 2009 9:39 pm Thanked: 6 times Exponents by okigbo » Wed Oct 28, 2009 3:42 pm (-1)^k+1(½^k). T is the sum of the first 10 k, is t a. > 2 b. between 1 and 2 c. between ½ and 1 d. between ¼ and ½ e. < ¼ Top Quote