If x+13 y=40 is normal to the curve y=5 x^2+\alpha x+\beta at the point (1,3), then the value of \alpha \beta is equal to

KEAM 2022 Math Solved Paper

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If x+13y=40 is normal to the curve y=5x2+αx+β at the point (1,3), then the value of αβ is equal to

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