±1 32 2- +1 3 - -1 3 AK2 2- -1 32D=1 1= 2 2 O= B C=S U T M

1

- ±1 3

2

2

- +

1 3

- -1 3

A

K

- -1 3

2

D

=

1

1

=

2

2

_O

=

B

^C

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

1

+ 1 -

-

2

2

+1 -

2010

2

+

+

+

+ 2

+

+ 1

+ 2

+ 2

- 1 -

³

2 -

= 5

2

<

<

3

+ 1 +

+ 1 -

-

2

=

+ 1 -

- (

+1 + ) = - 2

2

2

2

(

²

+ 1 - ).(

²

+1 + )

= 2

+

+ 2

+

+

2

=

= 1

+

+ 2

+

+ 2

(

+ 2 +

+

+ 2

= 1

2010

₁