1.

If ( x_1, y_1) , (x_2, y_2) ,(x_3y_3)are feet of the three normals drawn from a point to the parabola y^(2) =4ax "then"sum( x_1 -x_2) /( y_3)

Answer»

`4A`
` 2A`
` 1`
`0`

ANSWER :D


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