Quotient Rule for Differentials/Formulation 1
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Theorem
- $\map \d {\dfrac y x} = \dfrac {x \rd y - y \rd x} {x^2}$
Proof
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Sources
- 1972: George F. Simmons: Differential Equations ... (previous) ... (next): $\S 2.9$: Integrating Factors: $(11)$