A student was asked to find the equation of the tangent
plane to the surface [math][math][math]
At a glance, how do you know this is wrong. What mistakes did the student make? Select all that apply.
A. The answer is not a linear function.
B. The (x - 4) and (y - 5) should be x and y.
C. The partial derivatives were not evaluated a the point.
D. The -2869 should not be in the answer.
E. All of the above
(b) Find the correct equation for the tangent plane.