Question

27. find the sum of n terms of the series 1 x 2 + 2 x 3 + 3 x 4 + 4 x 5 +...​

Answer 1

Answer:

Here is the answer. Hope this might help you.

Answer 2

27. find the sum of n terms of the series 1 x 2 + 2 x 3 + 3 x 4 + 4 x 5 +...