设y=xcosx;求(d^2y)/(dx^2)
设函数y=sin(2x²+1),求dy/dx,d²y/dx²
已知y=cosx^2,求d^y/dx^2;d^y/dx^3..
设函数y=y(x)由x=1-e^t和y=t+e^-t确定,求dy/dx和d^2y/dx^2
设函数y=y(x)由方程y=xe^y确定,求dy/dx和d^2/dx^2
设y=2arctany/x,求dy/dx,dy^2/d^2x.
求曲线y=xcosx在x=π2
求函数的导数 y=3x^2+xcosx
设y=y(x)是由方程xy+e^y=y+1所确定的隐函数,求d^2y/dx^2 x=0
设参数函数x=ln(1+t^2),y=t-arctant.求(d^2y)/(dx^2).
一道高数题,设y=ln【f(x)】,其中f’’(x)存在,求(d^2y)/(dx^2) ,
y=xcosx^2 求导数
设参数方程x=t-In(1+t^2) y=arctant 确定函数y=y(x),求d^2y/dx^2