Solve a differential equation sytem. Eulers method

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SUMMARY

The discussion focuses on solving a system of differential equations using Euler's method. The equations presented are dx/dt = x + y and dy/dt = -y + 8x. Participants suggest using the exponential form for solutions, specifically x = const * exp[kt] and y = const2 * exp[kt]. The conversation emphasizes the application of Euler's method as a numerical approach to approximate solutions for the given system.

PREREQUISITES
  • Understanding of differential equations
  • Familiarity with Euler's method for numerical solutions
  • Knowledge of exponential functions and their properties
  • Basic skills in algebra and calculus
NEXT STEPS
  • Study the implementation of Euler's method in Python or MATLAB
  • Explore stability analysis of numerical methods for differential equations
  • Learn about the elimination method for solving systems of equations
  • Investigate the use of Runge-Kutta methods as alternatives to Euler's method
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Students and educators in mathematics, particularly those focusing on differential equations and numerical methods, as well as anyone seeking to enhance their problem-solving skills in applied mathematics.

prehisto
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Homework Statement


dx/dt=x+y
dy/dt=-y+8x
Solve this system useing Eulers method or by elimination method.

Homework Equations


Eulers method
I know that in general I should look for solution in form
y=const*exp[kx]
z=const2*exp[kx]
But in my case I am not sure if i can write x=const*exp[kx],because of x in exp.
Could someone help me please, maybe show me some first steps ?

The Attempt at a Solution


 
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prehisto said:

Homework Statement


dx/dt=x+y
dy/dt=-y+8x
Solve this system useing Eulers method or by elimination method.

Homework Equations


Eulers method
I know that in general I should look for solution in form
y=const*exp[kx]
z=const2*exp[kx]
But in my case I am not sure if i can write x=const*exp[kx],because of x in exp.
Could someone help me please, maybe show me some first steps ?

The Attempt at a Solution


Hi prehisto! :smile:

Perhaps you can try:
x=const*exp[kt]
y=const2*exp[kt]
 
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