Question:

If A and B are coefficients of xn in the expansions of (1+ x)2n and (1+x)2n – 1 respectively, then A/B is equal to 

Updated On: Feb 2, 2024
  • (A) 4
  • (B) 2
  • (C) 9
  • (D) 6
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The Correct Option is B

Solution and Explanation

Explanation:
A=2nCnB=2n1CnAB=2nCn2n1Cn=2nn=2
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