Bentuk sederhana dari: a: [-2/5]pangkat4 x [-2/5]² : [-2/5] pangkat3 b: [1/7]² : [1/7] x [1/7pangkat 3

a)
(-2/5)^4 × (-2/5)^2 : (-2/5)^3
= (-2/5)^4+2 : (-2/5)^3
= (-2/5)^6 : (-2/5)^3
= (-2/5)^6-3
= (-2/5)^3

b)
(1/7)^2 : (1/7) × (1/7)^3
= (1/7)^2-1 × (1/7)^3
= (1/7) × (1/7)^3
= (1/7)^1+3
= (1/7)^4

(ket : ^ → pangkat)