0 x 2y 2 July 8, 2019 16 32 64 128 X y 0 x 2y 2 X 2y 0 2x y 5 X 2y 0 2x y 3 X 2y 0 2x 3y 7 2 0 x 2y 4 X 2y 8 0 2x 4y 16 X 2y 2 x 0 y 3 X 2y 0 x 2y 4 X 2y 4 0 2x 4y 12 Ydx x 2y 2 dy 0 X 2y 2 dx xydy 0
