4 x 2y 0 July 8, 2019 16 32 64 128 X 2y 4 0 2 X 4 2y dx xdy 0 X 2y 4 0 2x 4y 12 X 2y 2z 4 0 X 2y 0 3x 4y 4 X 2y z 4 0 X 2y 4 0 graph 2y 4 x 0 in slope intercept form X 2y 4 0 grafica X 2y 4 0 is a common tangent X 2y 4 0 3x =- 4y 6 If x 2y 4 0 is a common tangent X 2y 3z 4 0