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in Mathematics by (66.0k points)

Find the focus of the point P from which tangents are drawn to parabola y2 = 4ax having slopes m1 , m2 such that 

(i) m1 + m2 = m0 (const) 

(ii) θ1 + θ2 = θ0 (const)

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Equation of tangent to y2 = 4ax, is

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