Find the equation of the tangent plane to the sphere (x-1)^2 +(y+1)^2 + (z-2)^2 = 6 at the point (1,-2,0)

Question

anonymous · Answer

I'm just so confused about the geometry of it especially since (1,-2,0) is not on the sphere

anonymous · Answer

Suppose f has a continuous partial derivatives. An equation  of the tangent plane to the surface 
$$z=f(x,y)$$
 at the point 
$$P(x_0,y_0,z_0)$$
 is 
$$z−z_0=fx(x_0,y_0)(x−x_0)+fy(x_0,y_0)(y−y_0)$$

anonymous · Answer

Ohh, okay. Then I cant help you, sry.

anonymous · Answer

No problem thanks for trying. Maybe someone else can