x^y-x^(y-1)等于什么? 5
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x^y-x^(y-1)
=x·x^(y-1)-x^(y-1)
=(x-1)·x^(y-1)
=x·x^(y-1)-x^(y-1)
=(x-1)·x^(y-1)
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展开全部
x^y-x^(y-1)
=x·x^(y-1)-x^(y-1)
=(x-1)·x^(y-1)
=x·x^(y-1)-x^(y-1)
=(x-1)·x^(y-1)
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
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