3The ordering and trans Portation cost C (in hundreds of dollars) for an automobi le dealerghip is modeled by C=6*+),X2 | where X is the number of automobiles ordered. %3D Find the oPen intervals on which the cost is incieasing or decreasing.

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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.