1 7 9 x ) 3 2x 7 July 8, 2019 16 32 64 128 1 7 9 x )+ 3 2x 7 6 x 2 9 1 2x 7 13 /( x 3 )( 2x 7 1 7/9 x 2 1/7 x 9 1) 7(a + 2) 2) 9(3 - x) 9 x 7 / 2
