Special integrating factor for almost exact equation, mu(y)

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Find a special integrating factor mu(y) for an almost-exact differential equation

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Almost Exact Differential equation & special integrating factor (introduction & example)

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How to solve exact and non-exact ODE

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Exact differential equation (introduction & example)

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But what is a partial differential equation? | DE2

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Linear Differential Equations & the Method of Integrating Factors

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Exact Equations [ODE]

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