List all equilibrium solutions of the differential equation, and classify the stability of each using a sign chart: y' = y(y - 6)²(y - 10)

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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### Differential Equations: Analyzing Equilibrium Solutions

This section covers techniques for solving differential equations and analyzing equilibrium solutions using a sign chart. Below are the outlined tasks:

#### (b) Particular Solution

- **Objective**: Find the particular solution to the initial value problem:
  \[
  y' = 6y - 10e^{2t}, \quad y(0) = 11.
  \]

#### (c) Equilibrium Solutions

- **Objective**: List the equilibrium solutions of the differential equation:
  \[
  y' = \frac{1}{2} \arctan(y).
  \]

#### (d) Equilibrium Solutions and Stability

- **Objective**: List all equilibrium solutions of the differential equation:
  \[
  y' = y(y - 6)^{2}(y - 10),
  \]
  and classify the stability of each using a sign chart.

#### (e) Long-term Behavior Prediction

- **Objective**: Use equilibrium solutions and stability analysis (sign chart) to predict the long-term behavior of a system given by the initial value problem:
  \[
  P' = P^2(P - 3)(P - 10), \quad P(0) = 8.
  \]

### Explanation

- **Equilibrium Solutions**: Solutions where the derivative \(y'\) or \(P'\) is zero, indicating no change, thus representing steady states.
- **Stability**: Determines whether small perturbations will decay (stable) or grow (unstable).
- **Sign Chart**: A graphical representation to determine the stability of equilibrium points by studying the behavior of the derivative around these points.
Transcribed Image Text:### Differential Equations: Analyzing Equilibrium Solutions This section covers techniques for solving differential equations and analyzing equilibrium solutions using a sign chart. Below are the outlined tasks: #### (b) Particular Solution - **Objective**: Find the particular solution to the initial value problem: \[ y' = 6y - 10e^{2t}, \quad y(0) = 11. \] #### (c) Equilibrium Solutions - **Objective**: List the equilibrium solutions of the differential equation: \[ y' = \frac{1}{2} \arctan(y). \] #### (d) Equilibrium Solutions and Stability - **Objective**: List all equilibrium solutions of the differential equation: \[ y' = y(y - 6)^{2}(y - 10), \] and classify the stability of each using a sign chart. #### (e) Long-term Behavior Prediction - **Objective**: Use equilibrium solutions and stability analysis (sign chart) to predict the long-term behavior of a system given by the initial value problem: \[ P' = P^2(P - 3)(P - 10), \quad P(0) = 8. \] ### Explanation - **Equilibrium Solutions**: Solutions where the derivative \(y'\) or \(P'\) is zero, indicating no change, thus representing steady states. - **Stability**: Determines whether small perturbations will decay (stable) or grow (unstable). - **Sign Chart**: A graphical representation to determine the stability of equilibrium points by studying the behavior of the derivative around these points.
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