高等数学上册设y=2x^2,则dy=()

设y=f(-x^2) 则dy= 设y=ln(1+x^2)则dy= 设y-x-1/2sinx,则dx/dy= 设y=(2+x)^x,(x>0) ,求dy 设y=[e^x+e^(-x)]^2,求dy 设ln(x^2+y^2)=arctan(y/x),则dy/dx= 设x^2+y^2=4,求dy/dx 设y=(x^2),求dy/dx 设y=cos^2(x+1),求dy 设y=tanx^3-2^-x,求dy 设y=sin2x/(1+x^2),求dy/dx, 设y=√(x^2-1)求dy/dx