Hi,

I need to find the differential equation of the following situation:

There's is an epidemic in a city of a certain poupulation(P). The rate of the spread is propoptionnal to the to the number of people infected times the number of person who are not infected.

I need to find the differential equation of this situation where N(t) will represent the number of people infetected(N) bas on the time. The only information I have is the populaiont(P...