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QJEEAdv04Mac7fe: JEE Advanced 2004 Mathematics - Class 11 JEEAdv04Mac7fe Solution: If then

If

{}^{n - 1}{C_r} = \left( {{k^2} - 3} \right)\,{}^n{C_{r + 1,}}

then

k \in

Multiple Choice Options

A $\left( { - \infty , - 2} \right)$
B $\left[ {2,\infty } \right)$
C $\left[ { - \sqrt 3 ,\sqrt 3 } \right]$
D $\left( {\sqrt 3 ,2} \right]$

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Answer

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