AAI ATC Junior Executive 2018 Shift 3 Paper

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Question : 61 of 120

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A partial differential equation formed from the relation
z = (x² + a)(y² + b) will be

$\;{δ z}/{δ x}\;{δ z}/{δ y} = 4xyz$
$\;{δ z}/{δ x}\;{δ z}/{δ y} = 4xy$
$\;{δ z}/{δ x} + \;{δ z}/{δ y} = 4xyz$
$\;{δ z}/{δ x}−\;{δ z}/{δ y} = 4xy$

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