已知y=x^2sin2x, 求y^50(pi)。

=(x)^2sin 2x, 求y(50)

=(x)^2sin 2x, 求y(50),

=(x)^2sin 2x, 求y(50),

(2)(dy)/(dx)+(y)/(x)=(sin x)/(x),y|_(x=pi)=1;(2)$\frac{dy}{dx}+\frac{y}{x}=\frac

(5)已知积分区域 = (x,y)||x|+|y|leqslant dfrac {pi )(2)} _(1)=iint sqrt ({x)^2+(y)^2}d

y=(sin 2x)/(x),求y简答题（共14题，80.0分）18.（5.0分）$y=\frac{\sin 2x}{x}$,求y'

设(X,Y)的分布函数为(x,y)=dfrac (1)({pi )^2}(dfrac (pi )(2)+arctan dfrac (x)(2))(dfrac (

(3) sin x=yln y ,|x=dfrac (pi )(2)=e;

求下列函数所指定的阶的导数:-|||-(1) =(e)^xcos x, 求y(4);-|||-(2) =(x)^2sin 2x, 求y(50),

已知(x,y)=(e)^x+(y-2)arcsin sqrt ({x)^2+(y)^2}，求(x,y)=(e)^x+(y-2)arcsin sqrt ({x)^