观察下列单项式:-x,2x2,-3x3,4x4,…根据你发现的规律,第n个单项式为_.
问题描述:
观察下列单项式:-x,2x2,-3x3,4x4,…根据你发现的规律,第n个单项式为______.
答
:由-x,2x2,-3x3,4x4的规律得第n个单项式为:n(-x)n.
故答案为:n(-x)n.