观察下列单项式:a .2a^2.4a^3.8a^4``````,根据你发现的规律,写出第N个式子是

问题描述:

观察下列单项式:a .2a^2.4a^3.8a^4``````,根据你发现的规律,写出第N个式子是

2^(n-1)*a^n
麻烦采纳,谢谢!