If x2+y2=25x^2 + y^2 = 25x2+y2=25, find d2y/dx2d^2y/dx^2d2y/dx2 at (3,4)(3, 4)(3,4).
−25/64-25/64−25/64
−3/4-3/4−3/4
111
25/425/425/4