y=sinx/cosx=tanxy'=(tanx)'=1/cos^2xy=(e^x+1)/(e^x-1)=(e^x-1+2)/(e^x-1)=1 + 2/(e^x-1)y'=0-2*(e^x-1)'/(e^x-1)^2=-2e^x/(e^x-1)^2y=x*根号xy=x^(1+1/2)=x^(3/2)y'=3/2 x^(3/2-1)=3/2 x^(1/2)=3/2 根号x