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)^z=0, 求 dfrac (partial z)(partial x) ,az/ay;-|||-(4) a+√(a^2-y^2)= ye" =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 (partial z)(partial x) ,az/ay;-|||-(6) =f(x+y+z,xyz), 求 dfrac (0z)(0x) dfrac (partial x)(partial y) dfrac (0y)({a)_(2)}