求极限lim(x→0,y→0)xln(x^2+y^2)的值?

问题描述:

求极限lim(x→0,y→0)xln(x^2+y^2)的值?

lim(x→0,y→0)xln(x^2+y^2)=lim(x→0,y→0)ln(x^2+y^2)^x=1请问为什么lim(x→0,y→0)ln(x^2+y^2)^x=1啊???更正一下:lim(x→0,y→0)xln(x^2+y^2)=lim(x→0,y→0)ln(x^(2x))=ln1=0