问题描述: (1/3a^ n+2 +2a^n+1) ÷ (-1/3 a ^ n-1 ) 计算 1个回答 分类:数学 2014-11-16 问题解答: 我来补答 (1/3a^ n+2 +2a^n+1) ÷ (-1/3 a ^ n-1 ) = -a³-6a² 再问: 详解 再答: (1/3a^ n+2 +2a^n+1) ÷ (-1/3 a ^ n-1 ) =(1/3a^ n+2 ) ÷ (-1/3 a ^ n-1 ) + (2a^n+1) ÷ (-1/3 a ^ n-1 ) = -a^(n+2-n+1) - 6a^(n+1-n+1) = -a³-6a² 展开全文阅读