cos(xy^2)=x+2y求导 y=x^1/x求导

cos(xy^2)=x+2y求导 y=x^1/x求导 x^2-y^2=xy 求导 求导：y=x-sin(x/2)cos(x/2). cos(xy)+x^6=y^6 求导 y=cos^3(2x)+e^x求导 cos(xy)-ln[(x+y)/y]=y当x=0时怎么求导, f(x^2-y^2,x-y)=x+y+x^2-xy,求f'(x,y)对y求导 如何对函数y=cos x^2和y=cos 2x求导? y=cos^2(1-2x)求导, 求导Y=(1+cos^2*x)/cosx^2 , 求导y=ln cos(2x+1) y=cos（2x²+1）求导 求导y=cos(2x+π/5)详细过程 xy-2x+y-z-2=0求导 x^2+xy-y^2=4求导 x^2-XY+Y^2=9求导 x^2-xy-y^2=1 怎么求导 e^(xy)-2x-y=0.求导