问题描述: lim n→∞ an^2+bn+1/3n-2=-2,求a,b之值 1个回答 分类:数学 2014-12-14 问题解答: 我来补答 lim n→∞ an^2+bn+1/3n-2 =lim n→∞ ( an + b + 1/n )/ (3-2/n) ∴ a = 0lim n→∞ an^2+bn+1/3n-2 = lim n→∞ bn+1/3n-2 = lim n→∞ [b + 1/n]/[3-2/n]= b/3 = -2∴ b = -6 展开全文阅读