niochi11 29 Tháng sáu 2009 15 ba`i!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
niochi11 28 Tháng sáu 2009 Dang online ha*\sum_{i=1}^k a_i^n************************************************************************************?????????/////////////////////
Dang online ha*\sum_{i=1}^k a_i^n************************************************************************************?????????/////////////////////
niochi11 28 Tháng sáu 2009 Minh lam xong het bai toan ve nha rui!>->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->-
Minh lam xong het bai toan ve nha rui!>->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->-