Seminar - Min Max của biểu thức 2 biến: Phương pháp giải và cách tạo bài tập Thầy: Nguyễn Hữu Hạnh

One of the problems is that everyone knows that A is equal to B, and B is equal to A. And of course, A, B, and D are the roots of A, B, and D. So, a very good student like me, who has met this problem many times, will be able to solve it. So, this problem is actually very simple. For example, this problem, which is A, and this is the solution of this problem. A is equal to B, and B is equal to A, B, and B is equal to A, B. Although it is very beautiful, but in the past, in the study of mathematics, there is something wrong with new methods. Now, it cannot be generalized like this. This problem is more complicated. I don't know what to do.