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The total resistance of the combination shown is

1. 40 a9
2. 3/40 a9
3. 2/5 a9
4. 100/3 a9

Correct answer: 3/40 a9

Solution

The circuit is a standard resistor-combination problem where the repeated parts simplify to a smaller equivalent network. After combining the appropriate series and parallel sections, the total resistance comes out to 3/40 a9.

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