Let w(x, y, z) = √x2 + y2 + z² where x = -8ret, y = 2te' & z = ert. дw dw Әх ду дz Әх ду Oz Ər Ət ar ar'ar Calculate дw 9 & by first finding 2 2 ôt’ột & and using the chain rule. Ət

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