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By a change of variable x(u v) = uv y(u v)...

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Calculus
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By a change of variable x(u, v) = uv, y(u, v) = v/u is double integral, the integrand f(x, y) changes to f(uv, v/u) \[\phi \] (u, v). Then, \[\phi \] (u, v) is

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Correct Answer: Option A
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