If x+4y=14 is a normal to the curve y^2=...

If `x+4y=14` is a normal to the curve `y^2=alphax^3-beta` at (2,3), then the value of `alpha+beta` is 9 (b) `-5` (c) 7 (d) `-7`

A

9

B

`-5`

C

7

D

`-7`

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