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in Binomial Theorem by (51.3k points)

If r = 0, 1, 2, ........10, let Ar, Br and Cr denote, respectively, the coefficent of xr in the expansions of (1 + x)10, (1 + x)20 and (1 + x)30. Then \(\sum\limits_{r=1}^{10}\) Ar (B10Br – C10Ar) is equal to

(a) B10 – C10

(b) A10 (B102 – C10A10)

(c) 0

(d) C10 – B10

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1 Answer

+1 vote
by (51.0k points)

(d) C10 – B10

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