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On question 37 in 2.5 of A First Course in Differential Equations with Modeling Applicatiosn 11th...

On question 37 in 2.5 of A First Course in Differential Equations with Modeling Applicatiosn 11th edition,

how do we decide that the substitution to use is u=v^(1-n)?

In general, how do we decide what to substitute when solving differential equations or using Bernoulli's equation?

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