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AIEEE 2004

JEE Main 2004 Mathematics question on Binomial Theorem

If n−1Cr=(k2−3) nCr+1^{n-1}C_r = (k^2 - 3)\, ^nC_{r+1}, then kk belongs to
  1. A.
    (−∞,−2)(-\infty, -2)
  2. B.
    [2,∞)[2, \infty)
  3. C.
    [−3,3][-\sqrt{3}, \sqrt{3}]
  4. D.
    (3,2](\sqrt{3}, 2]
Show answer

Correct option: D

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