A=F(Z)Z=G(Y)Y=H(X)求：dA/dX=?dA/dX=(dA/dZ)(dZ/dY)(dY/dX)dA/dX = (dF/dZ)(dG/dY)(dH/dX)举例：F(Z)=Z^2 G(Y)=SINYH(X)=LN X那么：dA/dX = 2Z*COSY/X = 2G(Y)COS[H(X)]/X...