07:24
Calculus: Early Transcendentals
Graph the surface and the tangent plane at the given point. (Choose the domain and viewpoint so that you get a good view of both the surface and the tangent plane.) Then zoom in until the surface and the tangent plane become indistinguishable.
$ z = \sqrt{9 + x^2y^2} $, $ (2, 2, 5) $