Question:medium

If sumᵣ=0ⁿ(-1)ʳfracⁿCᵣⁿ+3Cᵣ=(3)/(a+3), then a-n is equal to

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Such sums often simplify to rational expressions independent of r.
Updated On: Mar 19, 2026
  • 0
  • 1
  • 2
  • None of these
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The Correct Option is B

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