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Which, if any, of the given differential equations is exact? Show how you test each equation, but do not solve them. A. (ex siny +

Which, if any, of the given differential equations is exact? Show how you test each equation, but do not solve them. A. (ex siny + 3y) dx - (3x - er sin y) dy = 0 B. (3xy + y') dx + (x2 + xy) dy = 0

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