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______.

: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