Mathematics · 2015
JEE Main · 11 April 2015, Shift 1 · Q69
If Σ_n =1^5 1/(n ( n +1)( n +2)( n +3))=k/3, then k is equal to:
If $\displaystyle \sum_{\mathrm{n}=1}^5 \frac{1}{\mathrm{n}(\mathrm{n}+1)(\mathrm{n}+2)(\mathrm{n}+3)}=\frac{\mathrm{k}}{3}$, then k is equal to :
Official answer
(1)
$\displaystyle \frac{55}{336}$
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JEE Main 2015 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.