lmolmlm7018 lmolmlm7018
  • 05-02-2024
  • Mathematics
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If in the expansion of (1+x)¹⁵, the coefficient of (2r+3)ᵗʰ and (r−1)th terms are equal, then the value of r is

A. 5
B. 6
C. 4
D. 3

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