If u = ax + by and v = bx – ay, where a and b are constants, obtain ∂u/∂x and ∂v/∂y. By expressing x and y in terms of u and v, obtain ∂x/∂u and ∂y/∂v and deduce that

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= Show also that a a + b a + b a Ty = (27 - * ) = ab 2 a3f dudu + (b-a)-