Mathematics · 2022
JEE Main · 24 June 2022, Shift 1 · Q13
If { a_i}_i=1^n, where n is an even integer, is an arithmetic progression with common difference 1, and Σ_i=1^n a_i=192, Σ_i=1^n / 2 a_2 i=120, then…
If $\displaystyle \left\{\mathrm{a}_i\right\}_{i=1}^{\mathrm{n}}$, where n is an even integer, is an arithmetic progression with common difference $\displaystyle 1$, and $\displaystyle \sum_{i=1}^{\mathrm{n}} \mathrm{a}_i=192, \sum_{i=1}^{\mathrm{n} / 2} \mathrm{a}_{2 i}=120$, then n is equal to :
Official answer
(2)
$\displaystyle 96$
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JEE Main 2022 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.