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If the coefficient of x^(7) in [ax^(2)+(...

If the coefficient of `x^(7)` in `[ax^(2)+((1)/(bx))]^(11)` equals the coefficient of `x^(-7)` in `[ax-((1)/(bx^(2)))]^(11)`, then a and b satisfy the relation:

A

`a-b=1`

B

`a+b=1`

C

`b-a=1`

D

none of the these

Text Solution

Verified by Experts

The correct Answer is:
D
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