[racket] Am I Missing Something? [HtDP 31.3.1]

From: Luke Jordan (luke.jordan at gmail.com)
Date: Mon Jan 3 22:48:42 EST 2011

When I run the plain recursive vs. the accumulator version of sum with
g-series, I get the same result, which the text says isn't supposed to
happen.  Code attached.  What am I missing?

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