若(x-y)的m次方=3,(x-y)的n次方=5,求(x-y)的m+n次方.

问题描述:

若(x-y)的m次方=3,(x-y)的n次方=5,求(x-y)的m+n次方.

15
(x-y)的m+n次方=((x-y)的m次方)X(,(x-y)的n次方)=3x5=15

(x-y)的(m+n)次方
=(x-y)的m次方*(x-y)的n次方
=3*5
=15

(x-y)的m+n次方.
=(x-y)^m×(x-y)^n
=3×5
=15

(x-y)的m+n次方
=(x-y)的m次方×(x-y)的n次方
=3×5=15