Question

pls help I have exam tomorrow help full steps​

Answer 1

hope it will help you....

Answer 2

$\frac{81 \times {3}^{m} }{ {3}^{2m - 1} } = 1 \\ \frac{ {3}^{4} \times 3m}{ {3}^{2m - 1} } = 1 \\ {3}^{4 + m} = {3}^{2m - 1} \\ m = 6 - 1 \\ m = 5$