化简:(a^3-a^2-a+1)/(a^3-3a^2+3a-1)

(a 1)(a 2)(a 3)(a a(a-1)(a-2)(a-3)(a-4)因式分解 【1】a+a=a×a a= [ ]【2】a×a=a÷a a=[ ]【3】a×a=a－a a=[ ] [4]a－a=a＋a 化简; a-2a+3a-4a+5a-6a+``````-2006a+2007a. (a+1)(a+2)(a-3)计算 1A,2A,3A... 合并同类项3a*3a+a*a-(2a*2a)+(3a-a*a) a+a^2+a^3+a^4 (a-1)(a-2)(a-3)(a-4)-3因式分解, 1+a^1+a^2+a^3+.+a^n=? 计算a^3/a-1-a^2-a-1 已知 a>1,求证a^3>a+1/a-2