Ngày tải lên :
23/02/2014, 18:20
... +
+ + = +
3 3 2
3 3 2
2 3 2
2 3 2
2 3 2
2 3 2
2 3 2 2
2 3 2 2
3 2 2
3 2
4 2 2 ,
25 ,
4 2 2 .
3 3 2 ,
26 ,
2 3 2 .
7 4 ,
27 ,
7 4 .
2 11 4 3 ,
28 ,
2 11 4 3 .
2 4 ,
29 ,
2
x y x y x
y x y x y
x ... +
= − +
3 2
3 2
3 2
3 2
2 3
2 3
2 3 2
2 3 2
2 3 2
2 3 2
2 3 2
2 3 2
2 2 3 ,
18,
2 2 3 .
3 2 4 ,
19,
3 2 4 .
2 ,
20 ,
2 .
5 4 8 ,
21 ,
5 4 8 .
7 2 4 9,
22 ,
7 2 4 9.
8 3 8 3 2,
23 ,
8 3 8 3
x ... =
+ + =
+ + =
+ =
2
2
2
2
2
2
2
2 2
2 2
2 2
2 2
2
2
2 2
6 5 .
2 3,
9,
2 3.
13 4 ,
10,
13 4 .
2 4 5,
11,
2 4 5.
2 2,
12,
2 2.
3 4 2,
13,
3 4 2.
4 2,
14,
4 2.
4 2 1,
15,
y x y
x y
y x
x...