3、求由下列方程所确定的隐函数的导数:-|||-(1) ^2y+3(x)^4(y)^3-4=0 ,求 dfrac (dy)(dx)-|||-;(2) ln sqrt ({x)^2+(y)^2}=arctan dfrac (y)(x) ,求 dfrac (dy)(dx) :-|||-(3) ^-xy+2z-(e)^2=0 ,求 dfrac (7)(9)times .dfrac (9)(9) :-|||-(4) +sqrt ({a)^2-(y)^2}=y(e)^y =dfrac (x+sqrt {{a)^2-(y)^2}}(a)(agt 0) ,求 dfrac (dy)(dx),dfrac ({d)^2y}(d{x)^2} :-|||-(5) ^2+(y)^2+(z)^2-2x+2y-4z-5=0 ,求 dfrac (87)(6times ) -dfrac (9)(6)-|||-;(6) =f(x+y+z,xyz) ,求(c7)/(cx),(cx)/(cy),(Gy)/