Prove that z = xf (x + y) + yF(x + y), where f and F are
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Prove that z = xf (x + y) + yF(x + y), where f and F are arbitrary functions, satisfies the equation
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Zxx + Zyy = 22xy
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Let u x y then ux 1 and uy 1 and Zx fu xfuu yFuu Zxx ...View the full answer
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