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Sum of n Terms

Is Sn sum of...

Question

Is Sn sum of n terms of an AP then the value of (S_(2n)-S_(n)) is equal to

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S_{n}

S_{2 n}

S_{n}

S_{3 n} : S_{n}

S_{n}

n

S_{2 n} = 3 S_{n,}

\frac{S_{3 n}}{S_{n}}

S_{n}

f (n) = \frac{S_{3 n}}{S_{2 n} - S_{n}}

lim n \to \infty 2 n \sum r = 1 \frac{f (r)}{n}

S_{2 n} \neq S_{n}

S_{n}

n

A P

S_{2 n} = 3 S_{n}

S_{3 n} / S_{n}

If $S_{n}$ denotes the sum of first 'n' terms of an A.P. and $\frac{S_{3 n} - S_{n - 1}}{S_{2 n} - S_{2 n - 1}} = 31$ then the value of n is

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