Объяснение:
3)81^m:3^(4m-2)=3^4m:3^(4m-2)=
=3^(4m-(4m-2))=3^(4m-4m+2)=3²
4) (-3)^4n:27^n=(-3)^4n:3^3n=-3^n
Объяснение:
3)81^m:3^(4m-2)=3^4m:3^(4m-2)=
=3^(4m-(4m-2))=3^(4m-4m+2)=3²
4) (-3)^4n:27^n=(-3)^4n:3^3n=-3^n