X 1 x 2 x 3 x 4 =- 2 15 July 8, 2019 16 32 64 128 X 1 )/( x 2 x 3 )/( x 4 2 15 x ne2 4 8 ( x 1 )/( x 2 )-( x 3 )/( x 4 2 )/( 15 x = 2 4 8 x 1 )/( x 2 x 3 )/( x 4 2 15 x ne2
