(1+e^x/y)dx + e^x/y ( 1-x/y )dy =0
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Is this or ?
2nd one
If this is an exact equation of the form then . . as required. So it's an exact equation. That means that the solution has the property that and . Thus . (according to Wolfram)... Comparing these two results, it's easy to see that and . Therefore .
Thank you very much
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