设 y=a＾x+x＾n+x＾x 则dy/dx是?主要是x＾x的导数怎么出来的?

设 y=a＾x+x＾n+x＾x 则dy/dx是?主要是x＾x的导数怎么出来的? 设y=cosx+1n平方x,求dy. 设函数y=x^x,则dy= 设y=（x/1-x)^x,求dy/dx 设y=(2+x)^x,(x>0) ,求dy 设y=(lnx)/x,求dy? 设y=arctan(x-y),则dy= 设 x/y=ln(y/x) ,求 dy/dx 设F(X,Y)是连续函数,则∫(a,0)dx∫(x,0) f(x,y)dy= 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的5x次方,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.