... = 22 8x x− −tại x = 12( 1) ( 1) 2.( 1) 8 ( 1) 1 2 8 ( 1) 3 8 5PPP− = − − − −− = + −− = − = −Tại x = 02(0) 0 2.0 8 8P = − − = −Tại x = 422(4) 4 2.4 8 (4) 16 8 8(4) 8 8 0( 2) ... SGK )( )[ ][ ]) 2,5.0, 38. 0, 4 0,125.3,15.( 8) ( 2,5.0, 4).0, 38 ( 8. 0,125).3,150, 38 ( 3,15)0, 38 3,152,77a − − −= − − −= − − −= − +=[ ][ ][ ][ ][ ]) ( 20 ,83 ).0, 2 ( 9,17).0, 2 :: ... 2 983 25752417 17 17−= −−= − = =5 7 4) 1,456 : 4,5. 18 25 55 1456 25 9 4. . 18 1000 7 2 5b − += − +5 2 08 18 5 26 18 18 40 5 18 5 5= − + = − +Gi¸o viªn: Ngun TiÕn C¶nh 116 Trêng THCS...