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If 2 n1 Pn1 2 n1 Pn11 21 then n2n15 is equal to : null (Mathematics) | DivineJEE

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Mathematics

Exam

Mathematics

If

{ }^{2 n+1} \mathrm{P}_{n-1}:{ }^{2 n-1} \mathrm{P}_{n}=11: 21

, then

n^{2}+n+15

is equal to :

Select an option to instantly check whether it is correct or wrong.

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