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Find the relative error in Z, if Z = A^(...

Find the relative error in Z, if Z = `A^(4)B^(1/3)/CD^(3/2)`.

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`Z=(A^(4)B^((1)/(3)))/(CD^((3)/(2)))`
`:.` Relative error in Z,
`(DeltaZ)/(Z)=4(DeltaA)/(A)+(1)/(3)(DeltaB)/(B)+(DeltaC)/(C)+(3)/(2)(DeltaD)/(D)`
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