P28_018.PDF

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Chapter 28 - 28.18
18. Let the resistances of the two resistors be R 1 and R 2 . Note that the smallest value of the possible R eq
must be the result of connecting R 1 and R 2 in parallel, while the largest one must be that of connecting
them in series. Thus, R 1 R 2 / ( R 1 + R 2 )=3 . 0Ω and R 1 + R 2 =16Ω. So R 1 and R 2 must be 4 . 0Ω and
12 Ω, respectively.
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