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Exercise 104

Avg difficulty 2.5

Suppose dxdt=(x−α)(x−β)\frac{dx}{dt} = (x-\alpha)(x-\beta) for two numbers α<β\alpha < \beta.

  1. Find the critical points, and classify them.

For b), c), d), find lim⁡t→∞x(t)\displaystyle \lim_{t\to\infty} x(t) based on the phase diagram.

  1. x(0)<αx(0) < \alpha,
  2. α<x(0)<β\alpha < x(0) < \beta,
  3. β<x(0)\beta < x(0).

Lebl, Notes on Diffy Qs, §1.6 Autonomous equations, exercise 104

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Adapted from Notes on Diffy Qs © 2008–2026 Jiří Lebl. Licensed under CC BY-SA 4.0. Source: Notes on Diffy Qs: Differential Equations for Engineers. Imported at revision 658bcae.