For r = 0, 1, , 10, let A_r, B_r and C_r denote, respectively, the coefficient of x^r in the expansions of...

Question

For r = 0, 1, , 10, let A_r, B_r and C_r denote, respectively, the coefficient of x^r in the expansions of (1+x)^ 10 , (1+x)^ 20 and (1+x)^ 30 . Then _ r=1 ^ 10 A_r (B_ 10 B_r - C_ 10 A_r ) is equal to

Accepted Answer

(D)

JEE Advanced 2010 Mathematics question

Solution

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