A) 6
B) 4
C) 3
D) None of these
Correct Answer: C
Solution :
Since the semi-latus rectum of a parabola is the harmonic mean between the segments of any focal chord of a parabola, therefore \[SP,\,\,4,\,\,SQ\]are in H.P. \[\Rightarrow 4=2.\frac{SP.SQ}{SP+SQ}\Rightarrow 4=\frac{2(6)(SQ)}{6+SQ}\Rightarrow SQ=3\].You need to login to perform this action.
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