Let f(x,y) be a differentiable function satisfying the equation = xy. %3D ду af and After the change of variable x-s+t and y= s-t what equation ds will satisfy?

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A: Simply take the derivative of the given equation and simplify.

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A: Topic:- Calculus

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A: Explanation of the answer is as follows

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.