If a=11\ a n d\ b=9,\ then the value of...

If `a=11\ a n d\ b=9,\ ` then the value of `((a^2+b^2+a b)/(a^3-b^3))` is `1/2` (b) `1/(20)` (c) 2 (d) 20

A

`1/2`

B

2

C

`1/(20)`

D

`20`

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The correct Answer is:

A

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