for any integer k from 1 to 10, inclusion, the kth of a certain sequence is given by (-1)^{k+1}(\frac1 {2^k}). If T is the sum of the first 10 terms of the sequence, then T is:
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Agreater than 2
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Bbetween 1 and 2
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Cbetween\frac{1}{2} and 1
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Dbetween\frac{1}{4} and \frac{1}{2}
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Eless than \frac{1}{4}