1. The problem statement, all variables and given/known data This is a two part problem A) Find a vector normal to the plane at (2,1,7) B) Find a vector normal to the plane tangent to the paraboloid at (2,1,7) 2. Relevant equations Plane: z = x + y +4 Paraboloid: z = x^2 +3y^2 3. The attempt at a solution I'm not sure where to start. I know that a vector normal to the plane is <1,1,-1>, but that isn't at (2,1,7). Any help?