求二元函数极限 x→0,y→0,lim [(x+y)sin(1/x)cos(1/y)]
二元函数求极限:lim sin(x^2+y)/(x^2+y^2) x→0,y→0
二元函数求极限:lim (sin(x^2+y)) / (x^2+y^2) x→0,y→0
二元函数求极限一题!lim ln(x+e^y)/sqrt(x^2 + y^2)(x,y)->(1,0)
请求:二元函数求极限lim (x2+y2 )1/2-sin(x2+y2 )1/2(x,y→0) (x2+y2 )3/2请
求一道二元函数极限,Lim (x+y)[sin1/x]*[cos1/y](x,y)→(0,0)x,y分别趋向于0
lim(x→0y→1)(1+xe^y)^(2y+x/x)求极限
二元函数求极限问题lim[﹙2-e^xy﹚^1/2]-1=lim1/2(1-e^xy)(x,y)→(0,0) (x,y)
求极限lim(x,y)→(0,0) [1-cos(xy)]/xy^2.
求一个二元函数的极限lim((x^2)y+x^5)/(x^4+x^6+2(x^3)y+y^2))(x,y)->(0,0)
求极限 lim x→0 y→0[x^2+y^2+5/x+y sin(x+y)] 不懂极限,
求下列各极限 lim(x,y)→(0,1) (2-xy)/(x^2+2y)
求函数极限lim x→0 e^x-x-1/x cos x