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If the coefficient of x^(7) in the expan...

If the coefficient of `x^(7)` in the expansion of `(ax^(2)+b^(-1)x^(-1))^(11)` is equal to the coefficient of `x^(-7)` in `(ax-b^(-1)x^(-2))^(11)`, then ab equals:

A

1

B

2

C

3

D

4

Text Solution

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The correct Answer is:
A
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HIMALAYA PUBLICATION-BINOMIAL THEOREM-QUESTION BANK
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