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[" Consider two points "A(at_(1)^(2),2at_(1))" and "B(at_(2)^(2),2at_(2))" lying on the parabola "y^(2)=4ax" .If the line joining the points "A],[" and "B" passes through the point "P(b,0)," then "t_(1)t_(2)" is equal to "]

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Consider two points A(at_(1)^(2.2)at_(1)) and B(at_(2)^(2)*at_(2)) lying on the parabola y^(2)=4ax. If the line joining the points A and B passes through the point P(b,o). then t_(1)t_(2) is equal to:

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