lim(x->无穷)n^2(1-cos(1/n))急求解析,
问题描述：
lim(x->无穷)n^2(1-cos(1/n))急求解析,
答
lim(x→∞)x²(1-cos(1/x))＝lim(x→∞)(1-cos(1/x))／（1／x²）＝lim(x→∞)（－sin(1／x)／x²）／（－2／x³）＝lim(x→∞) sin(1／x)／（ 2／x）＝lim(x→∞) sin(1／x)／（ 1／x）／2＝lim(x...