填上“+”或“-”: (a-b)2=______(b-a)2,(a-b)3=__
问题:
填上“+”或“-”:
(a-b)2=______(b-a)2,(a-b)3=______(b-a)3,(a-b)2n=______(b-a)2n(n为正整数),(a-b)2n-1=______(b-a)2n-1(n为正整数).
填上“+”或“-”:
(a-b)2=______(b-a)2,(a-b)3=______(b-a)3,(a-b)2n=______(b-a)2n(n为正整数),(a-b)2n-1=______(b-a)2n-1(n为正整数).