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Three resistors of different values can be connected together in different configurations.
If all three resistors are used in a circuit, how many different values of total resistance can be
produced?
I can only find five... but the answer key says eight.

series,
then parallel,
then one in series with two parallel two at a time(I get three combinations here)
so far 5, then

two in series, one in parallel (three ways here).
eight total

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