PQ is a double ordinate of the parabola y2 = 4ax . The locus of the points of trisection of PQ is
(a) 9y2 = 4ax
(b) 9 x2 = 4ay
(c) 9y2 + 4ax = 0
(d) 9 x2 + 4ay = 0
Correct option (a) 9y2 = 4ax
Explanation:
