8 tuÇn kú II-Líp 10    ! "# $%&'()* +,  ( ) ( )      x x x− + + ≤      x x − ≥ −       x x x x− + < − + +,!"#$%&'"#()*+,-#(./')/.'*. 0  123!!45"(6+75&8(9:#()*0  !#;<-#*=>%?+,*@5A()0 +,-*"#()*B()C')*C'*(C+7D#EFFC0*9G      a b c+ + < 0 .&/'-)* 012 .34 +,56'*"H)3!         x x x x m m  − − ≤   − − + − ≥    H)3!I#C0  !##-H)3!BH#0 +,76!##-3!BH#      m x x x + + + + − = 012 .3,6 +,58*"H)3!         x x x x m m  − − ≤   − − + − ≥    H)3!I#C0  !##-H)3!+JH#0 +,78KL#-)3!H#M+, [ ] .x∀ ∈  ( )    m x m+ − − > 0   +,      x x ≥ + +     x x x− − ≤ −      x x x− + > + +,*" ( ) ( )      g x x m x m m= + − + − − !#m- ( ) g x = BH#NOH0 P,L7":m--? ( )  A g x = BQ+,#;x0 +,-!"#RA$%&"#()*B;2#/.8S()'(*T" ?UV74x + y + 14 = 0; 2x + 5y – 2 = 00 !#"S<W(:#0P8X@:5A@+7+JB+,()0 !#"S<W)+7*:#()*0 !YNHY#()*0 +,5*">?+7"#EZ'Z0 *#      a b a b a b + ≤ + + + . = 012 .3,6 +, 58 *"H)3!         x x x x m m  − − ≤   − − + − ≥    H)3!I#C0  !##-H)3!+JH#0 +, 78 KL#-)3!H#M+, [. x = BQ+,#;x0 +,-!"#RA$%&"#()*B;2#/. 8 S()'(*T" ?UV74x + y + 14 = 0; 2x + 5y – 2 = 00 !#"S<W(:#0P 8 X@:5A@+7+JB+,()0 !#"S<W)+7*:#()*0 !YNHY#()*0 +,5*">?+7"#EZ'Z0 *# . 8 tuÇn kú II-Líp 10    ! "#