3.4․22 Tangents and Normals
Condition: write the equation of the plane tangent to the surface \ (x^{3} -26 x y+2 z^{2} = 26^{3} \) at the point \ (a (26; 2; 26) \).
Solving Problems in Three-Dimensional Space Using Tangents and Normals, Both Straight Lines and Planes.