7.1   (a) Series

NOTE: The solution for 7.1 (an excerpt from the solutions manual) incorrectly shows partial derivative of R with respect to R1 in both terms, when the equation should account for each of the two variables: Partial w/ respect to R1, and also partial w/ respect to R2: Perhaps the authors noted that since both partial derivatives equal 1, they were mathematically interchangeable? If so that would be correct - but misleading!

(b) parallel



The maximum error for this case is larger: