Let A be the sum of the first 20 terms andB be the sum of the first 40 – InterviewSolution

1.	Let A be the sum of the first 20 terms andB be the sum of the first 40 terms of theseries12+2.22+32+2-42+52+2-62 +....If B-2A-100A, then N is equal to(1) 232(2) 248(3) 464(4) 496
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