Constructing a differential equation from the solution

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SUMMARY

The discussion revolves around constructing a differential equation from the given solution, which is expressed as y = c1e3x + c2xe3x + c3e2xsin(x) + c4e2xcos(x). The roots identified are k=3 (with multiplicity 2) and k=2+i, k=2-i. The challenge lies in formulating the differential equation that corresponds to these roots, particularly in understanding the relationship between the roots and the structure of the differential equation.

PREREQUISITES
  • Understanding of differential equations and their solutions
  • Knowledge of complex numbers and their conjugates
  • Familiarity with characteristic equations and their roots
  • Experience with exponential and trigonometric functions in calculus
NEXT STEPS
  • Study the construction of characteristic equations from given roots
  • Learn about the method of undetermined coefficients for solving differential equations
  • Explore the implications of complex roots in differential equations
  • Review the theory behind linear combinations of solutions in differential equations
USEFUL FOR

Students studying differential equations, mathematicians interested in complex analysis, and educators teaching advanced calculus concepts.

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Homework Statement



y = c1e3x+c2xe3x+c3e2xsin(x)+c4e2xcos(x)

Homework Equations



Differential Equations.

The Attempt at a Solution



I have the roots of k=3, k=3, k=2+i, k=2-i.
Now I am just stuck on how to put the roots together to get the original equation. I am just stuck on the complex number part.
 
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What equation is it which has the roots 3, 3, 2+i and 2-i? How do you get such equation from the differential equation? How the powers of k and the degree of the derivatives are related?

ehild
 

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