计算:(3a^(n+1)-6a^n+9a^(n-1)/(1/3a^(n-1)
计算:(3a^n+2+6a^n+1-9^n)÷3a^n-1
分式 计算:a^(2n+1)-6a^(2n)+9a^(2n-1) / a^(n+1)-4a^n+3a^(n-1)
计算:(3a^(n+1)-6a^n+9a^(n-1)/(1/3a^(n-1)
计算:(6a^n+2-9a^n+1+3a^n-1)÷3a^n-1
(3a^(n+1)+6a^(n+2)-9a^n)/3a^(n-1)是计算
证明n^n-n(n-a)^(n-1)>=n!a.其中n>=a>0
(3a^n+1+6a^n+2-9a^n)/3a^n-1是计算题
计算(3a的n+1次方-6a的n次方+9a的n-1次方)除以(3分之1a的n-2次方)
(3a^n-2)-6a^n+14a^n-1(因式分解) (m-n)^3+4(n-m)
若a>0,则lim{(3^n-a^n)/[3^(n+1)+a^(n+1)]}=?
a^(n+1)b^n-4a^(n+2)+3ab^n-12a^2
分式计算:(b^3n-1 )*c/(a^2n+1)除以 (b^3n-2)/(a^2n)