Let M(x, y) and N(x, y) be C1 functions with domain R2 {(0, 0)}. If M/y = N/x, then C M
Chapter 6, Problem 27(choose chapter or problem)
Let M(x, y) and N(x, y) be C1 functions with domain R2 {(0, 0)}. If M/y = N/x, then C M dx + N dy = 0 for any closed curve C in R2.
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