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+1 Solving-Math-Problems
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Sequence Series
Marc first writes the perfect squares as a sequence 1,4,9,16,25,36,49,64,81,100... After the number 1, he then alternates by making two terms negative followed by leaving two terms negative.Marc's new sequence is: 1,-4,-9,16,25,-36,-49,64,81,-100... What is the sum of the first 2011 terms in this new sequence?
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