3. Amarantha was asked to write an explicit rule for the geometric sequence -450, -270, -162, -97.2, ... She writes the explicit rule f(n) = -450(-0.6)"-1. Her rule is not correct. Explain the error that Amarantha made in writing the explicit rule.

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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.