= 0 = 2= - 2 = 2= 4 = 023233 7'2 4+ = 2( - 1) + = 21 2 1 2...

2 -

= 0

= 2

= - 2

= 2

= 2 - 4

= 0

2

3

3

7

'

2

4

+

= 2( - 1)

+

= 2 - 2

1

2

1

2

=

- 3

2

= 2 - 6

1 2

1

2

5

15

15

2

4

=

4

15

5

4

4

1

1

2

2

1

S u t m: OÀN TI N TRUNG - THCS Hoàng V n Th - N

2010

+

=

+

=

= 1

1

1

1

+

=

+

+ + +

+

+

+ + +

- 1

+ 1

+ 2

+1

-

:

+ 1

+ 3

- 4

- 1

- 1