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The measurement system shown in the figure uses three sub-systems in cascade whose gains are
specified as G1,G2 and 1 G3
The relative small errors associated with each respective subsystem G1 , G2 and G3 are ε1 , ε2 and ε3. The error associated with the output is
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ε1 + ε2 + 1 ε3 -
ε1 . ε2 ε3 - ε1 + ε2 - ε3
- ε1 + ε2 + ε3
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Correct Option: D
The relative error of product or division of different quantities is equal to the sum of relative errors of individual quantities.
