# Sigma? Sum! 3

Algebra Level 1

If $$\displaystyle \sum_{r=1}^{n} T_r = \dfrac{n(n+1)(n+2)(n+3)}{8}$$, find the value of $$\displaystyle \sum_{r=1}^{50} \dfrac{1}{T_r}$$ up to 3 decimal places.

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