... BDVH To¸n 8 N¨m Häc 20 11 -20 12
( ) ( ) ( )
( ) ( )
2
2
a) x 2 x 1 x 3 4x
b) x 1 x 1 x 3
4 2
c) x 4
3 3
1 3
d) x 5 x
2 4
− ≥ + + −
+ + ≤ −
− + <
− >
( ) ( ) ( )
2
2 2
2 2
a) x 2 x 1 x ... x
2
-4=0; B. x
2
-2x=0; C.
1 0;
2
x
=
D. 6x+ 12 = 0.
Bài 2:
Giải các pt sau:
2
1 2
/ 3 5( 2) ( 1)
2 3
/ (2 3) (2 3)( 1)
a x x t
b x x x
+ = +
= +
Bài 3:...