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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