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Coefficient[] bug?


I seem to be having a problem with the behaviour of Coefficient[] in
Mathematica, namely if I have a series such as

sum = ... + a n + b + c/n +....

then Coefficient[sum,n] gives a, Coefficient[sum,1/n] gives c, but
Coefficient[sum,1] does NOT give b, but zero instead! This is causing me
problems, and I cannot see a simple work-around.

Thankyou in advance,

Keith Slavin
Tektronix Inc,
Beaverton, Or
(503) 627 4907


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