3 x 2 9 2x 7 July 8, 2019 16 32 64 128 X 3 )+ 7x 2 )- 2x 9 )' 2x 2 7x 3 x 2 9 1 9 x 3 2x 2 72 3x 2 2x 9 7 2x 3 3x 2 9 7 2x 3 3x 2 9 7 verify 3 x 2 )+ 2x 7 x 1 )+ 9 X 3 )( x 2 3x 9 )- 2x x 3 7 3 x 7 )+ 4 x 2 2x 9 5 x 2 9 2x − 7 3 X 3 2x 2 34x 9 )/( x 7 Lim x → 3 x 2 9 2x 2 7x 3 X 3 7 )= 2 3 3 2x 9 14 4x 2 9 =( x 7 )( 2x 3
