1. The number of newly notified players per minute is exactly the total number of all notified players and teachers, that is, the number of newly notified players in the nth minute is equal to the total number of notified players and teachers in the previous (n- 1) minutes.

2. In the nth minute, the total number of all notified players and teachers is a geometric series, and the general formula is an=2n. The total number of all players notified in the nth minute is (2n- 1).

3、 ? N people call each other, so the total number of * * * is 1+2+3+4+5+6...+n, and if people call each other like several line segments, the total number is1+2+3+4+...+n.

Introduction:

The problem of making phone calls is also difficult for students to understand when studying. This telephone question tests that everyone needs to sum up a certain reasoning ability when solving practical problems, and through the process of reasoning, students can be trained to have a detailed consideration of the ways and methods to solve problems in the world.