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A sequence of integers a 1 + a 2 + …. + a 2 satisfies a n – 2 = a n + 1 – a n for n > 1. suppose the sum of first 999 terms is 1003 and the sum of first 1003 terms is -999. find the sum of the first 2002 terms.

A sequence of integers a1 + a2 + …. + a2 satisfies an – 2 = an + 1 – an for n > 1. suppose the sum of first  999 terms is 1003 and the sum of first 1003 terms is -999. find the sum of the first 2002 terms.

Grade:12

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