     2 2   2  2P X 2 1 X 3 2

2) - DAP AN CHUYEN NGUYEN TRAI HAI DUONG 20092010
Lớp 10 DAP AN CHUYEN NGUYEN TRAI HAI DUONG 20092010

2)

   

 

2

2

 

2

2

P x 2 1 x 3 2