28. The latusrectum of the parabola y2 = 4ax whose focal chord is PSQ such that SP = 3 and SQ = 2 is given by :
(a) 24/5
(b) 12/5
(C) 6/5
(d) 1/5
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=>. 12/5
Since the semi Latus rectum of a parabola is the HM of segment of a focal chord.
Semi Latus rectum = (2SP.SQ)/(SP + SQ)
(2 × 3 × 2) / (3 + 2) = 12/5
Latus rectum of the parabola = 12/5.
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Answer
=>. 12/5
Since the semi Latus rectum of a parabola is the HM of segment of a focal chord.
Semi Latus rectum = (2SP.SQ)/(SP + SQ)
(2 × 3 × 2) / (3 + 2) = 12/5
Latus rectum of the parabola = 12/5.
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