设 y=x+1ncosx,求dy

设 y=x+1ncosx,求dy 设y=Ex的平方 1ncosx求dy 设y=ex-1ncosx,求dy 设y=Ex -1ncosx,求dy. 设 y等于e的x次方- 1ncosx 求dy 效率 谁知道y等于e,x的平方减1ncosx,求dy y等于e右上角是x减1ncosx,求dy 设y=（x/1-x)^x,求dy/dx 设y=ln(x/1+x)-cot2x,求dy. 设y=(1/x)^x,求dy 设y=e^(-x) cos 1/x,求dy. 设y=(lnx)/x,求dy? 设函数 y = cos2x / (x-1) 求 dy 设y=√(x^2-1)求dy/dx 设y=sin2x/(1+x^2),求dy/dx, 设y=cos^2(x+1),求dy 设y=ln(1+e^-x)求dy 设y=(1-x)³cosx,求dy/dx