A tangent drawn at P lying on the curve x^{3} = y intersects the curve again at Q. If m{1}
is the slope at P and m{2} is the slope at Q, then
m{2} = n m{1}.
Find,
n^{n+1} +(n-1) n^{n-1} + (n-2) n^{n-2} +......

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