1.

Let A be the sum of the first 20 terms and B be the sum of the first 40 terms of the series12+2⋅22+32+2⋅42+52+2⋅62+….If B−2A=100λ, then λ is equal to

Answer»

Let A be the sum of the first 20 terms and B be the sum of the first 40 terms of the series

12+222+32+242+52+262+.

If B2A=100λ, then λ is equal to



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