# 考满分网

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:
• Agreater than 2
• Bbetween 1 and 2
• Cbetween$\frac{1}{2}$ and 1
• Dbetween$\frac{1}{4}$ and $\frac{1}{2}$
• Eless than $\frac{1}{4}$

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• 所属科目:数学PS
• 题目来源1:PREP07 Test 1-37
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