I've been assigned a project but I'm having trouble on one isolated part. Could someone help me out a bit? Thanks.(adsbygoogle = window.adsbygoogle || []).push({});

Solve y'(t) = py(t)(1 - (y(t)/k) )

* Discuss qualitatively the solution diagram. Address in particular the question of equilibria and the behavior of solutions near these equilibria. Determine the behavior of solutions as t -> infinity. Note that only solutions satisfying y(0) >= 0 are relevant.

I've solved the equation (by seperation) though there might be some errors (please correct):

case 1: y<k

1/[1/(c*e^(rt)) + (1/k)]

case 2: y>k

(c*e^rt)/[c/(k*e^(rt)) - 1]

Now, I'm stuck on what is meant by the equilibria etc. For graphing with maple am I to assume any constant? Also, r and k are constant (reproduction and carrying capacity respectively) but not given. Am I to choose any values for these and graph solutions/direction fields for each possibility and record the general behavior? I don't have a solid understanding of the actual math and an even shakier knowledge of maple so it's pretty frustrating when putting the two together.Any suggestions and help would be greatly appreciated. Also, it's hinted that there is one "appropriate predator-equilibrium for the application under consideration." Basically, an equilibrium that can be used for y to solve:

x'(t) = rx(t)(1 - (x(t0?k) - px(t)y(t)

Any ideas?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Appropriate predator-equilibrium

**Physics Forums | Science Articles, Homework Help, Discussion**