Solving Bernoulli ODE | Step-by-Step Guide | Example with n=-2

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    Bernoulli Ode
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SUMMARY

The discussion focuses on solving a Bernoulli Ordinary Differential Equation (ODE) represented by the equation 3xy²y' = 3x⁴ + y³, where n = -2. The user correctly identifies the substitution v = y³ and the derivative y' = (1/3)v^(-2/3)v'. The integrating factor used is x^(-1). The confusion arises from a discrepancy in the final result, where the user initially calculates y³ = X² + Cx, while the reference book states y³ = X⁴ + Cx. Ultimately, the user acknowledges a minor error in their calculations.

PREREQUISITES
  • Understanding of Bernoulli ODEs and their general form
  • Familiarity with integrating factors in differential equations
  • Knowledge of substitution methods in solving ODEs
  • Basic calculus, particularly differentiation and integration techniques
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  • Study the derivation of integrating factors for different types of ODEs
  • Explore advanced techniques for solving Bernoulli ODEs
  • Review examples of ODEs with varying values of n
  • Practice solving ODEs using substitution methods and verify results against standard texts
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Students and professionals in mathematics, particularly those studying differential equations, as well as educators looking for step-by-step examples of solving Bernoulli ODEs.

cue928
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I am working on the following Bernoulli ODE: 3xy^2 y' = 3x^4 + y^3. I come up with n = -2, so v = y^3 and y' = (1/3)v^(-2/3) v'. My integrating factor was x^-1. I end up with y^3 = X^2 + Cx yet the book has the same thing except X^4 instead of X^2. That makes me think I'm going wrong with multiplying it through but I don't see where.
 
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hi cue928! :smile:

(try using the X2 icon just above the Reply box :wink:)
cue928 said:
My integrating factor was x^-1. I end up with y^3 = X^2 + Cx yet the book has the same thing except X^4 instead of X^2.

it should have worked :confused:

show us how you got the x2
 
It was right, I just made a stupid mistake that led me to think it was something bigger than what it really was.
 

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