If the sum of the series up to term is 488 and the term is negative, then...

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If the sum of the series 20 + 19\frac{3}{5} + 19\frac{1}{5} + 18\frac{4}{5} + up to n^{{th}{~}} term is 488 and the n^{{th}{~}} term is negative, then: Sequence & Series (Mathematics)

If the sum of the series\n

20 + 19\frac{3}{5} + 19\frac{1}{5} + 18\frac{4}{5} + \ldots

up to\n

n^{\text{th}\text{~}}

term is 488 and the\n

n^{\text{th}\text{~}}

term is negative, then