因式分解:a^(n+1)+3a^n+2a^(n-1)
问题描述:
因式分解:a^(n+1)+3a^n+2a^(n-1)
答
a^(n+1)+3a^n+2a^(n-1)
=a^(n-1)*(a^2+3a+2)
=a^(n-1)*(a+2)*(a+1)答案是不是a的n-1次方乘a+2乘a+1?是请接纳