tolong aku kak.......... harus pakai cara

a) (1/2)⁻⁵ = (2⁻¹)⁻⁵ = 2⁵.

b) (-1/9)⁻³ = (9)⁻³ = (3²)⁻³ = 3⁻⁶ = 1/3⁶

c) 4⁻² = 1/4²

d) 7⁻⁴ = 1/7⁴.

Sifat yang digunakan : 

*  1/a⁻ⁿ = aⁿ.

*  1/aⁿ = a⁻ⁿ.

* (aˣ)ⁿ = aˣⁿ