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Let the point A divide the line segment joining the points P(-1,-1,2) and Q(5,5,10) internally in the ratio r:1\ (r>0). If O is the origin and (\overrightarrowOQ*\overrightarrowOA)-\dfrac15\lvert\overrightarrowOP*\overrightarrowOA\rvert^2=10, then the value of r is: | Watch the step-by-step video solution for this NIMCET PYQ.