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WBJEE2011MathematicsBinomial TheoremActual

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

Correct answer

1

Step-by-step solution

( array r Hints: A= ^ 2 n C_n B= ^ 2 n-1 C_n array ) ( A B = ^ 2 n C _ n ^ 2 n -1 C _ n = 2 n n =2 )

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