Mathematics · 2020
JEE Main · 3 September 2020, Shift 2 · Q56
If the sum of the series 20+19 3/5+19 1/5+18 4/5+… up to n^th term is 488 and the n^th term is negative, then:
If the sum of the series
$\displaystyle 20+19 \frac{3}{5}+19 \frac{1}{5}+18 \frac{4}{5}+\ldots$ up to $\displaystyle \mathrm{n}^{\text {th }}$ term is $\displaystyle 488$ and the $\displaystyle \mathrm{n}^{\text {th }}$ term is negative, then :
Official answer
(4)
$\displaystyle \mathrm{n}^{\text {th }}$ term is -$\displaystyle 4$
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JEE Main 2020 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.