Find the sum to n terms of the series :-  5 + 11 + 19 + 29 + 41 +..........

  • 151

 Ya u right.

  • -18

Hi friend,

thanks for giving a detailed answer.You have used method of differences,

but I didnt understand how that  -An-1 came while subtracting.Pls show me step by step.

Thanks in Advance

  • -8
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