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Modeling Population Growth

Mathematica Asked on March 4, 2021

So I have an equation to describe population growth

population growth equation

where a and b are constants. Typically b is small so that initially, since the population p(t) is small, the squared term can be neglected and the population growth is exponential.

how do I solve the differential equation for p(t) with p(t = 0) = 1 where a = 2 and b = 0.05
and how do I find the value of p(t) as t → ∞

One Answer

Clear[p]
p[t_] = p[t] /. 
  DSolve[{p'[t] == 2 p[t] - 0.05 p[t]^2, p[0] == 1}, p, t][[1]]
Plot[p[t], {t, 0, 5}]

enter image description here

Answered by Daniel Huber on March 4, 2021

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