What are the solutions and domains for Homogenous Linear Equations (Wave)?

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SUMMARY

The discussion focuses on solving homogeneous linear equations, specifically through the method of substituting derivatives into the ordinary differential equation (ODE). The example provided involves the function \(y_1 = e^{2x}\), where the first and second derivatives are calculated and substituted into the ODE, confirming that \(y_1\) is indeed a solution. The conversation also addresses the implications of the interval of definition for solutions, clarifying that the solutions are valid for all real \(x\) unless specified otherwise.

PREREQUISITES
  • Understanding of ordinary differential equations (ODEs)
  • Knowledge of derivatives and their applications
  • Familiarity with exponential functions
  • Basic concepts of solution intervals in calculus
NEXT STEPS
  • Study the method of undetermined coefficients for solving ODEs
  • Learn about the existence and uniqueness theorem for differential equations
  • Explore the implications of solution intervals in differential equations
  • Practice solving various homogeneous linear equations using different functions
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Students preparing for exams in calculus or differential equations, educators teaching ODEs, and anyone seeking to deepen their understanding of homogeneous linear equations and their solutions.

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i have a test on friday that I am studying for so i was working through some problems in my textbook. i came across this question and I am stuck on what to do. can anyone help me out?
thanks
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What you can do here is take the first and second derivatives (with respect to $x$) of the solutions given and substitute them into the given ODE and see if an identity results. For example, let's do $y_1$:

$$y_1=e^{2x}$$

And so we find:

$$y_1'=2e^{2x}$$

$$y_1''=4e^{2x}$$

And then substituting these into the ODE, we find:

$$4e^{2x}-7\cdot2e^{2x}+10e^{2x}=0$$

$$0=0$$

Thus, we know $y_1$ is a solution of (A). Try the other two...:D
 
I understand now ^^ but what if it were on a different interval from like 0 to 1 instead. Would that make a difference or does it mean that the function only exists on this interval?
 
As given, the solutions are defined for all real $x$. The ODE and/or solution will tell you where the solution is defined, either explicitly, or implied. :D
 

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