TOÁN 12 - Ôn Tập của Hàm số - Buổi 14 ( Series học hè Toán 12 cùng 2k9)

I was lazy yesterday, but I'll be diligent today! Teaching principles: 1. The principle is: "My students may not be brilliant, but they must have manners and etiquette." 2. "Are you currently brilliant?" or "Are you about to become brilliant?" You are currently brilliant, but your future is uncertain if you don't strive! You are about to become brilliant; you may not be brilliant now, but if you strive, you can become brilliant in the future! 💫💫💫💫💫💫💫💫💫💫💫💫💫💫 https://www.facebook.com/profile.php?...   / thaytrong   [email protected] 💫💫💫💫💫💫💫💫💫💫💫💫💫💫💫 #tuyensinh #tuoihoctro​ #maths #changetrong