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What is the interval of convergence for the series $\sum _{ n=0 }^{ \infty }{ \cfrac { { x }^{ 3n } }{ \left( 3n \right) ! } } $?

$-\infty \ < \ x < \infty $

$-1 < x < 1$

$0 < x \le 1$

$0 < x < 3$