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The equation of the tangent at (2,3) on ...

The equation of the tangent at (2,3) on the curve `y^2=a x^3+b` is `y=4x-5.` Find the values of `aa n dbdot`

A

2,7

B

`-2,7`

C

`2,-7`

D

`-2,-7`

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The correct Answer is:
C
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