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If the coefficient of x^(8)"in"(ax^(2)+(...

If the coefficient of `x^(8)"in"(ax^(2)+(1)/(bx))^(13)` is equal to the coefficeinet of `x^(-8)" in" (ax-(1)/(bx^(2)))^(13)` , then a and b will satisfy the relation -

A

ab + 1 =0

B

ab = 1

C

`a = 1 - b `

D

`a + b = -1 `

Text Solution

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The correct Answer is:
A
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