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If the normal line at (1, -2) on the cur...

If the normal line at `(1, -2)` on the curve `y^2=5x-1` is `ax - 5y +b=0` then the values of `a and b` are

A

4,-14

B

4,14

C

`-4,14`

D

`-4,-14`

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A
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