A. $\infty$
B. 0
C. 1
D. 2
lim_(x arrow + infty)(x^2+y^2)sin (3)/(x^2)+y^(2)A. 0B. 3C. 1/3D. ∞
6.求下列各极限:-|||-(1) lim _((x,y)arrow (0,1))dfrac (1-xy)({x)^2+(y)^2} :-|||-(3) lim
6.求下列各极限:-|||-(1) lim _((x,y)arrow (0,1))dfrac (1-xy)({x)^2+(y)^2} ;-|||-(3) lim
lim _((x, y)arrow (1,0)) (ln (1+xy))/(y) = ( ).A. -1B. 0C. 1D. 2
极限lim _(x arrow 0) x sin (1)/(x^2)=( )A. 1;B. $\infty$;C. 不存在.D. 0;
lim _(x arrow 1) (x-y)/(x^2)-y^(2)=A. 0 ;B. $\frac{1}{2}$ ;C. $\infty$ ;D. 不存在.
计算lim _((x,y)arrow (0,0))dfrac (xy)(sqrt {xy+1)-1}=_____________计算_____________
lim ((sin x))^tan x-|||-arrow dfrac (pi )(2)
设(x,y)=sin xy,则(x,y)=sin xy设,则
求lim _(arrow 0)dfrac (x-sin x)({(arctan x))^3}=lim _(arrow 0)dfrac (x-sin x)({(a