Q. 5

Mark the correct alternative in the following :

If A and B are the sums of odd and even terms respectively in the expansion of , then is equal to

A.4 (A+B)

B. 4 (A – B)

C. AB

D. 4 AB

Answer :

Given:






So,




= 2A


So,




=2B




=2A2B


=4AB

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