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Which of the following equations represents Clairaut’s partial differential equation?

Which of the following equations represents Clairaut’s partial differential equation? Correct Answer z=px+qy+f(p,q)

Equations of the form, z=px+qy+f(p,q) are known as Clairaut’s partial differential equations, named after the Swiss mathematician, A. C. Clairaut (1713-1765).

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