问题
填空题
若n为正整数,则
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答案
当n为偶数时,
=(1-a)n (a-1)n+1
=(a-1)-1=[-(a-1)]n (a-1)n+1
;1 a-1
当n为奇数时,
=(1-a)n (a-1)n+1
=-(a-1)-1=-[-(a-1)]n (a-1)n+1
.1 a-1
若n为正整数,则
|
当n为偶数时,
=(1-a)n (a-1)n+1
=(a-1)-1=[-(a-1)]n (a-1)n+1
;1 a-1
当n为奇数时,
=(1-a)n (a-1)n+1
=-(a-1)-1=-[-(a-1)]n (a-1)n+1
.1 a-1