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If v(x,y) =x^(2) -xy + 1/4 y^(2) +7, x,y...

If `v(x,y) =x^(2) -xy + 1/4 y^(2) +7, x,y in R`, find the differential dv.

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The correct Answer is:
`therefore dv = (2x -y) dx + ( -x + (1)/(2) y) dy`
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