幂運算小題目 1.25^m÷5^m=() 2.-y^3n+1÷y^n+1 3.(x-y)^5 X(x-y)^4= -()^3

幂運算小題目 1.25^m÷5^m=() 2.-y^3n+1÷y^n+1 3.(x-y)^5 X(x-y)^4= -()^3

5^m
-y^2n
(y-x)^3