Given that \(\sum_{r=1}^{k}7\times{3}^{r}=620004\),Show that \(k=\frac{log59049}{log3}\) - চর্চা

Given that \(\sum_{r=1}^{k}7\times{3}^{r}=620004\),Show that \(k=\frac{log59049}{log3}\) - চর্চা