lim[2-√(xy+4)]/xy x趋向于0 y趋向于0
lim[2-√(xy+4)]/xy x趋向于0 y趋向于0
求极限lim(xy^2)/(x^2+y^4) (x,y)趋向于0
lim[sin(xy)/xy],x趋向2,y趋向0,求极限
求极限lim「ln(1+xy)」/(x根号y)x趋向于a,y趋向于0+
(xy)^2/x^2+y^2的极限 x和y都趋向于0
lim((x^2)y)/(x^4+y^2),x和y都趋向于0
求个极限 x趋向于1 y趋向于0 lim ln(x+e^y)/√(x^2+y^2)
lim X趋向于0 arcsin2x/sin3x
lim(x趋向于0)arctan2x/sin3x
二元函数求极限,分子为2-根号下(x+4),分母为xy,xy均趋向于0
求lim x趋向于0(arctanx)/(x^2+1)
lim(1-2^x)^sinx x趋向于-0