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)
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)
lim(x→0y→1)(1+xe^y)^(2y+x/x)求极限
一道二元函数极限题(lim)(x+y)/(x^(2)+y^(2))其中x,y都趋近于无穷
求极限lim(y-x)x/根号下(x^2+y^2) x,y趋近于0
求极限 lim x→0 y→0[x^2+y^2+5/x+y sin(x+y)] 不懂极限,
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
求两道多元函数的极限lim=(x²-y²-2x+2y)/(x+ y-2) ① (x,y)→(2,0)
求极限(工本高数)lim [2-(xy+4)^(1/2)]/xyx->0y->0证明函数f(x,y)=(x+y)/(x-
证明x,y趋于0时,x^2y/(x^4+y^3)的极限不存在