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JEE MATHEMATICS MCQ: PERMUTATIONS

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Application +4 | -1

If

{ }^n C_{r-1}=\left(k^2-8\right)\left({ }^{n+1} C_r\right)

, then

k

belongs to

View answer and explanation

Correct option: C

[-3,-2 \sqrt{2}) \cup(2 \sqrt{2}, 3]

Option C ([-3,-2

\sqrt{2}

) ∪(2

\sqrt{2}

, 3]) is correct because it correctly determines the range of k based on the given condition and the properties of combinations.

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