y=sin(2x+1)+arctanx求下列函数的定义域.

y=sin(2x+1)+arctanx的定义域 y=sin(2x+1)+arctanx求下列函数的定义域. 求(1-x^2)arctanx的导数y=(1-x^2)arctanx 求通解(1+x^2)y'+y=arctanx (1+x^2)y'=arctanx,求微分方程, y=(1+x^2)arctanx微积分 证明sin(arctanx)=x/根号(1+x^2) 设f(x)可导,且f'(0=1,又y=f(x^2+sin^2x)+f(arctanx),求dy/dx /x=0 tan(arctanX+arctanY)=(X+Y)/(1-XY)想了很久,没转过来......还有 sin(2arctanX)=2X/(1+X^2) 3.设y=(1+x^2)arctanx,求y ,y/x=1 . 微分方程y'-y/[(1+x^2)arctanx]=arctanx的通解? 高数 去微积分方程通解求微分方程(1+x²)y'=arctanx的通解解：(1+x²)(dy/dx)=arctanx,分离变量得：dy=[(arctanx)/(1+x²)]dx积分之,即得通解为：y=∫[(arctanx)/(1+x²)]dx=∫(arctanx)d(arctanx)=(1/2)(arc 求函数y=1+x分之arctanx的导数, y=arctanx/x,求dy y=f[(x-1)/(x+1)],f'(x)=arctanx^2,求dy/dx,dy 设y=(1+x^2)arctanx-ln(x+根号(1+x^2))求微积分.. y=（x^2-1)arctanx,求n阶导数y(n) y=(1+x^2)^arctanx 对y求导