If the sum of n terms of an A.P. is cn(n - 1) where c \neq 0, then | Filo

Class 11

Math

Algebra

Sequences and series

541
150

If the sum of terms of an A.P. is where , then sum of the squares of these terms is

1. None of these
Solution:
Let the be

Given

Required series

Sum of terms square

since sum of square of first n natural numbers

541
150

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