若n为正整数,当x=-1时,(-x^2n)^2n+1的值为?
问题描述:
若n为正整数,当x=-1时,(-x^2n)^2n+1的值为?
答
[-x^(2n)]^(2n+1)
=[-(-1)^(2n)]^(2n+1)
=(-1)^(2n+1)
=-1