1/3a^2n -(-7a^n)+(-1)^2n+1 a^n -(2/5a^2n)-5a^n(n为正整数)
(3a的n+2次方b-2a的n次方b的n-1次方+3b的n次方)*5a的n次方b的n+3次方(n为正整数,n大于1)
当a=1时,式子-5a^n-a^n+8a^n-3a^n-a^n+1(n为正整数)等于( )
当a=1时,式子-5a^n-a^n+8a^n-3a^n-a^n+1(n为正整数)等于?
(1)(a-b)^2n-1乘以[(b-a)^n]^2(n为正整数)
若n为正整数,a=-1,则-(-a^2n)^2n+3等于
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{
相反数大于-n(n为正整数)的正整数有( )个 A n B n-1 C -n+1 D 2n-1
当a=-1时,式子-5a^n-a^n+8a^n-3a^n-a^(n+1)(n是正整数)等于多少
(3a^n-2)-6a^n+14a^n-1(因式分解) (m-n)^3+4(n-m)
已知A^N=2,(N为正整数)求(A^3N)^3-(A^2)^3N的值
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