1.

If A,B,C are 3 points on a parabola , Delta _1, Delta_2are the areas of triangles is formed by the points A, B,C and the tangents at A, B, C . IfDelta_1, Delta _2are the roots of px^(2) +qx +r=0then condition is

Answer»

`9Q^(2) =2pr`
` 9pr= 2q^(2) `
` 9p^(2) = 2qr`
` 2P^(2) =9qr `

Answer :B


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