问题描述: 求二元函数极限 x→0,y→0,lim [(x+y)sin(1/x)cos(1/y)] 1个回答 分类:数学 2014-09-17 问题解答: 我来补答 f(x,y) = (x+y)sin(1/x)cos(1/y)0 ≤ | f(x,y)| ≤ |x+y| ≤ |x| + |y| -> 0原式 = 0 展开全文阅读