设y=e1/x+5x,求dy

设y=e1/x+5x,求dy 设y=e1/x次方+5x次方 求dy y=e1/x次方+5x次方,求dy 设y=x的5x次方,求dy 设y=(lnx)/x,求dy? 设y=e-5x-tanx,求dy 设Y=arctan(5x) 求dy 设y=（x/1-x)^x,求dy/dx 设y=(2+x)^x,(x>0) ,求dy 设 x/y=ln(y/x) ,求 dy/dx 设y=ln(x/1+x)-cot2x,求dy. 设y=x乘以根号x+lncosx,求dy, 设y=(1/x)^x,求dy 设y=x分之㏑x求dy! 设y=x√x＋lncosx,求dy 设y=[e^x+e^(-x)]^2,求dy 设y=x√x+cos3x,求dy 设y=e^(-x) cos 1/x,求dy.