Tolong bantuannya.......

2.
[tex]a. \: {3}^{ - 5} = \frac{1}{ {3}^{5} } \\ b.( - 8)^{ - 4} = \frac{1}{( - 8)^{4} } [/tex]

3.
[tex]a. \: \frac{1}{ {7}^{2} } = {7}^{ - 2} \\ b. \: \frac{1}{ {2}^{6} } = {2}^{ - 6} [/tex]

Semoga bisa membantu..