5 3y 1 )- 9 July 8, 2019 16 32 64 128 5 9 3y )=- 8 1 9y 1 3y 5 9y 7 2 2 3y 1 3 5 9y 9 3y 1 )= 5 2y 12 5 3y 18 =- 1 9y 5 3y 8 )- 2 9y 1 y 2 9y 5 3y 1 1 9 5 3y )- 1 3 y 0 5 0 3y 1 9 1/3y+5/9y=7 2