BAI TAP PT - BPT VO TI

Bài tập phƯƠng trình -bất phƯƠng trình vô tỉ
Giải các phơng trình sau:
1,
3 6 3x x+ + =
2,
9 5 2 4x x+ = +
3,
4 1 1 2x x x+ =
4,
2 2
( 3) 10 12x x x x =
5,
3 3
4 3 1x x+ =
6,
3 3 3
2 1 1 3 1x x x + = +
7,
2 2 1 1 4( 2005)x x x khốiD
+ + + + =
8,
2 1 2 1 2( 2000)x x x x BCVT
+ =
9,
3(2 2) 2 6( 01)x x x HVKTQS
+ = + +
10,
2 2
2 8 6 1 2 2( 2000)x x x x BK+ + + = +
11,
2 2 2 2

5 5
1 1 1( 2001)
4 4
x x x x x PCCC
+ + = +
12,
2
( 1) ( 2) 2 ( 2 2000 )x x x x x SP A + + =
13,
2 2
2 8 6 1 2 2( 99)x x x x HVKTQS+ + + = +
Tìm m để phơng trình :
14,
2
2 2 1( 2006)x mx x KhốiB+ + = +
có 2 nghiệm phân biệt
15,
2
2 3 ( )x mx x SPKT TPHCM+ =
có nghiệm
16,
2
2 3 ( 98)x mx x m GT+ =
có nghiệm
Giải các phơng trình sau :
17,
2 2
11 31x x
+ + =
18,

2
( 5)(2 ) 3 3x x x x+ = +
19,
2 2
3 3 3 6 3( 98)x x x x TM + + + =
20,
2 3
2 5 1 7 1x x x
+ =
21,
2 3
2 4 3 4x x x x
+ + = +
22,
2 2
3 2 1( 99)x x x x NT + + =
23,
1 4 ( 1)(4 )( 20001)x x x x NN
+ + + +
24,
2 2
4 2 3 4 ( Đ 2001)x x x x M C+ = +
25,
2
2 4 6 11x x x x + = +
26,
2
2 3 5 2 4 6 0( 01)x x x x GTVT TPHCM
+ + =
27,

2
3 2 1 4 9 2 3 5 2( 97)x x x x x HVKTQS + = + +
28,
2
7 4
4 ( Đô Đô 2000)
2
x x
x DL ng
x
+ +
=
+
29,
3 3
2 1 1
2( 95)
1 2 2
x
GT
x x
+ + =
+
30,
2
2 2
1
x
x
x

+ =

31,
2 2
1 1 (1 2 1 )x x x+ = +
32,
2 2
(4 1) 1 2 2 1(Đ 78)x x x x ề + = + +
33,
2 2
3 1 ( 3) 1( 01)x x x x GT+ + = + +
34,
2 2
2(1 ) 2 1 2 1x x x x x + =
35,
2
1 1( 98)x x XD
+ + =
36,
3
2 1 1( 2000)x x TCKT
− = − − −
37,
3
7 1( 96)x x LuËt
+ − = −
38,
3 3
3 3
7 5

6 ( § ¸ )
7 5
x x
x C KiÓmS t
x x
− − −
= − −
− + −
39,
3
3
1 2 2 1x x+ = −
Gi¶i c¸c bÊt ph¬ng tr×nh sau :
1,
( 1)(4 ) 2( § 2000)x x x M C
− − > − −
2,
1 3 4( 99)x x BK
+ > − + −
3,
3 2 8 7 ( 97)x x x AN
+ ≥ − + − −
4,
2 3 5 2 ( 2000)x x x TL
+ − − < − −
5,
2 2
( 3) 4 9(§ 11)x x x Ò− − ≤ −
6,
2

1 1 4
3( 98)
x
NN
x
− −
< −
7,
2
2
4( 01)
(1 1)
x
x SPVinh
x
> − −
+ +
8,
2 2
12 12
( 99)
11 2 9
x x x x
HuÕ
x x
+ − + −
≥ −
− −
9,
2 2 2

3 2 6 5 2 9 7( 2000)x x x x x x BK+ + + + + ≤ + + −
10,
2 2
4 3 2 3 1 1( 2001)x x x x x KT− + − − + ≥ − −
11,
2 2
5 10 1 7 2 (§ 135)x x x x Ò+ + ≥ − −

12,
2
4 (4 )(2 ) 2 12(§ 149)x x x x Ò
− − + ≤ − −
13,
3 2
( 1) ( 1) 3 1 0( 99)x x x x XD
+ + + + + > −
14,
3 1
3 2 7( ¸ ª 2000)
2
2
x x Th iNguy n
x
x
+ < + − −
15,
2 2
( 4) 4 ( 2) 2( 99)x x x x x HVNH− − + + − < −