If sqrtx+ sqrty = sqrta then y (2)+ (1+ ...

If `sqrtx+ sqrty = sqrta` then `y _(2)+ (1+ y_(1)) ^(3) y =`

A

`1//2a`

B

`1//2`

C

`1//a`

D

`-1//2a`

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The correct Answer is:

A

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