3A^(N+3)-9A^(N+2)+5A^(N+1)-2A^N与-A+10A^（N+3）-5A^(N+1)-7A^(N+2)的差是（ ）.

(3a^n+1+6a^n+2-9a^n)/3a^n-1 (6a^n+2 +3a^n+1 -9a^n)/3a^n-1 -a^n-(-5a^n-1)-2(a^n-1-3a^n) a^3n=5,则2a^6n-a^9n= a^n+2+a^n+1-3a^n因式分解 计算:(3a^n+2+6a^n+1-9^n)÷3a^n-1 3A^(N+3)-9A^(N+2)+5A^(N+1)-2A^N与-A+10A^（N+3）-5A^(N+1)-7A^(N+2)的差是（ ）. 如果n是正整数,[(8a^n+3)-(6a^n+2)-(5a^n+1)]/(-a)^n 1/3a^2n -(-7a^n)+(-1)^2n+1 a^n -(2/5a^2n)-5a^n(n为正整数） 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*B-2A^N*B^N-1+3B^N)*5A^N*B^N+3(N为正整数,n＞1) (a^3*b^9)^n+2(-a^n*b^3n)^3+(ab^3)^3n 因式分解 a^4n+a^3n+a^2n+a^n 有可能使物体做匀速直线运动的是：A.4N 5N 7N B.3N 4N 8N C.2N 5N 9N D.5N 7N 13N然后我想问一下为什么 计算(3a^n+1-6a^n+9a^n-1)/(1/3a^n-2) (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 计算：(6a^n+2-9a^n+1+3a^n-1)÷3a^n-1