1.The sum of the reciprocals of focal distances of a focal chord PQPQPQ of y2=4axy^2 = 4axy2=4ax isa.1a\frac{1}{a}a1b.aaac.2a2a2ad.12a\frac{1}{2a}2a1Login to continueOnly logged in users canattempt or see the solution.
