dz/dt = -Bz(1 – vz), z(0) = 1. %3D

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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If Beta and v are rates, find z(t).

The given mathematical expression represents a first-order ordinary differential equation (ODE) with an initial condition. It can be transcribed as follows for educational purposes:

---

**Differential Equation and Initial Condition**

The following differential equation describes the rate of change of a variable \( z \) with respect to time \( t \):

\[ \frac{dz}{dt} = - \beta z (1 - v z) \]

where:
- \( \beta \) and \( v \) are constants.
- \( z \) is the dependent variable.
- \( t \) is the independent variable (time).

The initial condition provided is:

\[ z(0) = 1 \]

This means that at time \( t = 0 \), the value of \( z \) is 1.

---

**Explanation:**

This equation is a nonlinear first-order ordinary differential equation. The term \(- \beta z (1 - v z)\) indicates that the rate of change of \( z \) depends on both \( z \) and a combination of \( z \) and constants \( \beta \) and \( v \). This type of equation often arises in various fields such as biology for population growth models, physics for certain decay processes, and even finance for modeling certain types of investments. 

The initial condition \( z(0) = 1 \) is essential for solving this differential equation as it provides a starting point for the solution.
Transcribed Image Text:The given mathematical expression represents a first-order ordinary differential equation (ODE) with an initial condition. It can be transcribed as follows for educational purposes: --- **Differential Equation and Initial Condition** The following differential equation describes the rate of change of a variable \( z \) with respect to time \( t \): \[ \frac{dz}{dt} = - \beta z (1 - v z) \] where: - \( \beta \) and \( v \) are constants. - \( z \) is the dependent variable. - \( t \) is the independent variable (time). The initial condition provided is: \[ z(0) = 1 \] This means that at time \( t = 0 \), the value of \( z \) is 1. --- **Explanation:** This equation is a nonlinear first-order ordinary differential equation. The term \(- \beta z (1 - v z)\) indicates that the rate of change of \( z \) depends on both \( z \) and a combination of \( z \) and constants \( \beta \) and \( v \). This type of equation often arises in various fields such as biology for population growth models, physics for certain decay processes, and even finance for modeling certain types of investments. The initial condition \( z(0) = 1 \) is essential for solving this differential equation as it provides a starting point for the solution.
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