{[a^(2n+1)-6a^(2n)+9a^(2n-1)]/(a^2-9)}/[a^(n+1)+4a^(n)+4a^(n
分式 计算:a^(2n+1)-6a^(2n)+9a^(2n-1) / a^(n+1)-4a^n+3a^(n-1)
计算:(3a^n+2+6a^n+1-9^n)÷3a^n-1
a^(n+1)b^n-4a^(n+2)+3ab^n-12a^2
(3a^n-2)-6a^n+14a^n-1(因式分解) (m-n)^3+4(n-m)
计算a^2n+1-6a^2n+9a^2n-1/a^2-9除以a^n+1+4a^n+4a^n-1/a^2-4
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
(3a^n+1+6a^n+2-9a^n)/3a^n-1是计算题
数列{a},a(1)=2,a(n+1)=4a(n)--3n+1,n属于正整数.证明{a(n)--n}是等比数列;求数列{
a1=1/4 ,a(n)=a(n-1)/{[(-1)^n]×a(n-1)-2} (n≥2,n∈N)
求证:(1)A(n+1,n+1)-A(n,n)=n^2A(n-1,n-1); (2)C(m,n+1)=C(m-1,n)+
2道初二分式计算1.a^(n+1)-6a^n+9a^(n-1)2.a^(n+1)-4a^n+4a^(n-1)这两个怎么分