Mathematical problems at doctoral level

The distance between Party A and Party B is 150KM. Party A and Party B ride bicycles from Party A and Party B respectively at a speed of10 km/h. At the time of departure, a fly flew from A's bike to B at the speed of 15KM/h, met B and then flew to A, and so on until AB met it. Q: How far can a fly fly fly?

Dry goods on the ground: five ways to make your products "different"

How many people are there in each of the following lines?

Collection of Mathematics Lovers (Discussion on Mathematics Books)

What role does it play in mathematical research?

The first volume of Grade Three 100.

Can people from other regions participate in the Mathematical Modeling League in Central China?

Hunan Province Higher Vocational Single Recruitment Examination Form

What does Luoyang Vocational and Technical College enroll in e-commerce?

What mathematical formulas do you need to master to learn the senior one?

A brief introduction to business at the University of Toronto, Canada