$\color{#e1e7ee}{⸻𖤐}
\color{#d1dbe6}{⛧}
\color{#c3cfde}{⸻⸻⸸}
\color{#b4c3d6}{⋆}
\color{#a6b7ce}{\text{Ƥเ}}
\color{#98abc6}{\text{๓є}}
\color{#8aa0be}{\text{ђค}}
\color{#7d95b6}{ϟ}
\color{#6f8aad}{⛓}
\color{#627fa5}{⸸⸻⸻}$

Ta có`:`

`((-1)/4)^7 : ((-1)/4)^3 = ((-1)/4)^4=(1/4)^4`

Lại có`:`

`[(0,25)^2]^2= (0,25)^4`

Vì `1/4=0,25` nên `((-1)/4)^7 : ((-1)/4)^3 = [(0,25)^2]^2`