lim(x*2+y*2)sin(3\x*2+y*2)
lim sin(y×x^2+y^4)/(x^2+y^2) x,y都趋于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
极限:lim趋向1 sin(x+1)分之x的3次方+1 2.y=x的3次方-3x 极大值2 极小值-2
求极限 lim x→0 y→0[x^2+y^2+5/x+y sin(x+y)] 不懂极限,
lim sin(xy)/y 当X趋于2,Y趋于0时的极限拜托各位了 3Q
证明下列极限不存在(1) Lim x+y/x-y (2)lim x²y²/ x²y&sup
y =(cos^2) x - sin (3^x),求y'
化简sin(2x-y)*sin y+cos(2x-y)*sin y
lim[sin(xy)/xy],x趋向2,y趋向0,求极限
证明sinx+siny+sinz-sin(x+y+z)=4sin((x+y)/2)sin((x+y)/2)sin((x+
求极限lim(y-x)x/根号下(x^2+y^2) x,y趋近于0