lim x趋于无穷 x^/1+x^=1还是0?
lim x趋于无穷 x^/1+x^=1还是0? lim x趋于1 [2(根号1-x)]/x=1还是0?
lim x^2/(1+x^2)=lim 1/[x^(-2)+1]=1. lim 2√(1-x)/x=0.
等于一上下同时除以x 取平方在写成相减形式0-0等于0
1
1.1 2.0
问:考研数学若lim [sin6x+xf(x)]/x^3=0 则lim [6+f(x)]/x^2=? x都趋于0 答案是36
答:这是数学二考研真题. lim[6+f(x)]/x^2=lim[6+f(x)]/x^2-0 =lim[6+f(x)]/x^2-lim[sin6x+xf(x)]/x...详情>>