Answer
$= \log_7 3+3\log_7 x+4\log_7 y$
Work Step by Step
$ \log_7 (3x^{3}y^{4})$
$= \log_7 3+\log_7 x^{3}+\log_7 y^{4}$
$= \log_7 3+3\log_7 x+4\log_7 y$
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