Resolve Initial Value Problem | Find y0 for Diverging Solutions

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SUMMARY

The discussion focuses on solving the initial value problem for the differential equation y' - (3/2)y = 3t + 2e^t with the initial condition y(0) = y0. The user correctly identifies p(t) as -3/2 and u(t) as e^(-3t/2), leading to the general solution involving a constant c derived from y0. The key conclusion is that the value of y0 determines the divergence of solutions as t approaches infinity, separating positive and negative growth. The user resolves their confusion regarding the arithmetic and integral rules necessary for finding y0.

PREREQUISITES
  • Understanding of first-order linear differential equations
  • Familiarity with integrating factors in differential equations
  • Knowledge of exponential functions and their properties
  • Basic skills in solving initial value problems
NEXT STEPS
  • Study the method of integrating factors for first-order linear differential equations
  • Learn about the behavior of solutions to differential equations as t approaches infinity
  • Explore the concept of stability in differential equations and how initial conditions affect it
  • Review techniques for solving initial value problems in differential equations
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Mathematics students, educators, and anyone involved in solving differential equations, particularly those interested in initial value problems and their implications on solution behavior.

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I am having trouble with the below problem:

y'-(3/2)y= 3t+ 2e^t, y(0)= y0. fine value of y0 that separate solutions that grow positively and negatively as t=> infinity.

I found p(t) to be -3/2, u(t) to be e^-3t/2
=> e^-3t/2*y' - 3y/2( e^-3t/2)= e^-3t/2(3t+ 2e^t)
=> -2 -4e^t + ce^ 3t/2
where I found c = y0+6/ e

Do you guys see any errors in my math so far? i am confused as to find y0 where the solutions diverge (pos. vs neg)

Thanks
 
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I get

y=-2t - \frac 4 3 -4e^t+(y_0+\frac{16}{3})e^{\frac 3 2 t}

so you might want to check your arithmetic. Since you have a negative times one exponential and a positive times the other, that might have something to do with the positive vs negative thing.
 
@LC youre right, thanks. I am a little rusty in my integral rules. Got it now
 

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