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If the normals at the points P, Q, R on ...

If the normals at the points P, Q, R on the parabola `y^2 = 4x` meet in the point `(h, k)`. If the centroid and orthocentre of the triangle PQR is `(x_1, y_1) and (x_2, y_2)`, then find the value of `3x_1- 2x_2`

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