Permudahlan kedua soal dibawah.

Bab Bilangan Berpangkat
Matematika SMP Kelas IX

1] ((1/a) . (1/(b -1))⁻¹
= (a⁻¹)⁻¹ . ((b - 1)⁻¹)⁻¹
= a . (b - 1)
= ab - a

 2] (x^(3/5))⁵ . ((x)^(1/4))⁸ . (x⁻¹) ⁻¹
= x³ . x² . x
= x³⁺²⁺¹
= x⁶