bµi tËp tù luyÖnGiải các phương trình sau 1.
Trang 1bµi tËp tù luyÖn
Giải các phương trình sau
1.
0 2 1
9
2.
4 1
x
3.
9 4 3 4
4.
1 2 6 6
2 − x+ = x−
x
5.x2 + 3x + 1 = (x + 3)
1
2 +
x
6.
5 2
10
x
7.
8 2 7
x
8.
(3 )(6 ) 3 6
9.
( 1) ( 2) ( 3)
10.
14
x x
x
−
+ −
11.
2 1 2 1
2 − + − − =
x
12.
1 2 6 7 2
4
2− − + + − − =
x
13.
1 3 2 2
14.
4
3 x−1+3= 82−x
15.
2
= 9
3 2x−1
22. x2 +
7
+
x
23. 5 x3+ =1 2(x2+2)
24.
2
x− + − = −x x x+
2
26.
2
x 1 x+ = +4x 5+
27.
2
3x 1+ = −4x +13x 5−
28.
x + =2 3 3x 2−
29.
2
2x 1− + x + = −3 4 x
30
1
+
x
31
2 1
1 3
32
0 3 2
3 x+ + x+ + x+ =
Trang 20 4 4
2 2
3
=
− +
−x x
x
34
1
25−x2 = x−
35
7 9
17
1 2
2 2 2
2 −x− − x− + = x+
x
18
1 2
10 6
4
1 4
2
1 2
+ + +
+ + + +
+
+
x
36
16 3 5 2 2 3 1 3
19
3 6 3 3
2 − x+ + x − x+ =
x
20
2
5 16
1 1
16
5
x x
x
37 (4x−1) x2+1=2x2+2x+1
38 10 x3 +8=3(x2 −x+6)
21
6 12
24
42
2 1
4 −x+ x− =
39 3 x−9 =(x−3)2 +6
40
6 12 8 2
x
41
16 9 3 1 3 6
x
42 2(x2 −2)=5 x3 +1
Trang 343
5 40
44
4 5 4
5
6
+ +
+
x
x x
x
46
1 7
3 x+ − x =
47
1 3
3 − = x + x−
x
48 2(1−x) x2 +2x−1= x2 −2x−1
49
2 2
50
2 3 5 4 8
4 6
x
51
11 6 4
x
52
18 6 11
6
15
2
2
+
−
= +
−
+
x
x
x
x
53
2 3 5 4 13
6 11
x
18 8 5
x
55
0 20 6 2 16 2
x
56
12
35 1
1 1
2 =
−
+
x x