5a^n-2a^n-8a^n+1+6a^n-a^n+1(n为正整数）急死!

如果n是正整数,[(8a^n+3)-(6a^n+2)-(5a^n+1)]/(-a)^n 5a^n-2a^n-8a^n+1+6a^n-a^n+1(n为正整数）急死! 5a^n-2a^n-8a^n+1+6a^n-a^n+1 n是正的整数 a^n+2-6a^n+5a^n-2(n>2且n为整数 合并同类项：5a的n次方-2a的n次方-8a的n+1次方+6a的n次方-a的n+1次方 设a,n∈N*证明a^2n-(-a)^n≥(a+1)×a^n （4a^2n-6a^n+1+2a^n)/2a^n 因式分解 (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) 如果a^n+a^-n=5,那么a^n/(a^2n+a^n+1)的值是什么 a^n+1+a^n-1-2a^n因式分解 a^n+2+a^n+1-a^n因式分解 a^n+2+a^n+1-3a^n因式分解 因式分解:a^n+2-6a^n 计算(6a^(n+2)-8a^n)/(-1/2a^(n-1)) 因式分解:10a^n+2-6a^n+8a^n-1 (a^n+1)-(a^n-2)等于