2.10.50 Number Series

Condition: Using a sign of Dalalamber, to explore the convergence of a row. \ [\ sum_ {n = 0}^{\ infty} \ frac {4 \ cdot 7 \ cdot 13 \ cdot \ ldots \ cdot (3 n+4)} {3 \ cdot 7 \ cdot 1 \ cdot \ ldots \ cdot (4 n+3) \] \] \] \] \] \] \] \] \] \] \] \] \] \] \] \] \]