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Let A be the sum of the first 20 terms and B be the sum of the

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Let A be the sum of the first 20 terms and B be the sum of the first 40 terms of the series $1^{2} + 2.2^{2} + 3^{2} + 2.4^{2} + 5^{2} + 2.6^{2} + \dots$ If $B - 2 A = 100 λ$ then $λ$ is equal to

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Michael Discussed

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} + \dots

B - 2 A = 100 λ

then

λ

is equal to

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Question Text

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} + \dots

B - 2 A = 100 λ

then

λ

is equal to

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