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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

`ab = 1`

D

`a/b = 1`

Text Solution

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The correct Answer is:
C
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