#gmatclubApproach

For every even integer 2n from 1 to 8, inclusive, the nth term of a certain sequence is given by (−1)^n(1/2^n) . If S is the sum of such a sequence then S is

A. Between -1 and -1/2

B. Between -1/2 and 0

C. Between 0 and 1/4

D. Between 1/4 and 3/4

E. Between 3/4 and 5/2

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