# Sequences and Series

Algebra Level pending

Let $$V(r)$$ denote the sum of the first $$r+1$$ terms of an arithmetic progression whose first term is $$r+1$$ and common difference is $$\dfrac 1r$$. Let T(r) = V(r)- V(r-4) & S= V(1) + V(2) ........+ V(10)

Then V(11) x common difference of the series T(11),T(12),T(13) is

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