To ask Unlimited Maths doubts download Doubtnut from – https://goo.gl/9WZjCW Let A be the sum of the first 20 terms and B be the sum of the first 40 terms of the series `1^2+2.2^2+3^2+2.4^2+5^2+2.6^2+…` If `B-2A=100lambda` then `lambda` is equal to
(1) 232
(2) 248
(3) 464
(4)496
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