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

ab=1

D

`a/b=1`

Text Solution

Verified by Experts

The correct Answer is:

C

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