Cyclic neutropenia is a blood disorder in humans characterized by periodic fluctuations in the density of a certain kind  of blood cell called neutrophils. The density of neutrophils  reaches highs of around 2000 cellsymL of blood and lows  near zero. The period of fluctuations is approximately three weeks. Model the temporal dynamics of neutrophils in days,  assuming that the density is at its highest on day 0.

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Sequence and Series

A sequence is defined as a collection of things. Series is defined to sum the things one by one in the sequence.  It was invented by German mathematician Carl Friedrich Gauss.