Anh ơi, em sửa đề rồi ạ, anh xem lại giúp em
https://diendan.hocmai.vn/threads/chung-minh-lon-hon-hoac-bang-tex-a-4-b-4-c-4-geq-a-3-b-3-c-3-tex.809066/#post-3975244
Thanks anh
https://diendan.hocmai.vn/threads/chung-minh-lon-hon-hoac-bang-tex-a-4-b-4-c-4-geq-a-3-b-3-c-3-tex.809066/#post-3975244
Thanks anh