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Question

The term independent of x(x>0, x1) in the expansion of [(x+1)(x2/3x1/3+1)(x1)(xx)]10 is


A

105

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B

210

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C

315

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D

420

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Solution

The correct option is B

210


[x131x12]10
If independent term is
Tr+1 then r=4
Tr+1=210

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