For every integer K from 1 to 10, inclusive, the Kth term of a certain sequence is given by (-1)^k+1 (1/2^K. If T is the sum of the first 10 terms in the sequence, then T is?
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https://www.beatthegmat.com/-t28541.html
https://www.beatthegmat.com/1-k-1-1-2-k-help-t25607.html
