Jump to content
You currently have javascript disabled. Several functions may not work. Please re-enable javascript to access full functionality.
THPTLucNam BG 11A4 2013 hasn't added any friends yet.
Posted by THPTLucNam BG 11A4 2013 on 20-10-2013 - 07:58
Tu $A_{n}^{3} +2A_{n}^{2}=100$ tìm ra n roi khai trien nhi thuc niu ton tìm ra số hạng $C_n^{5}.1^{2n-5}.(3x)^5$ có hệ số là $C_n^{5}.3^{5}$