Search any question & find its solution
Question:
Answered & Verified by Expert
If ' $a$ ' and ' $c$ ' are the segments of a focal chord of a parabola and $b$ the semi-latus rectum, then
Options:
Solution:
2581 Upvotes
Verified Answer
The correct answer is:
$a, b, c$ are in H.P.
Semi latus rectum is harmonic mean between segments of focal chords of a parabola.
$\therefore \quad b=\frac{2 a c}{a+c} \Rightarrow a, b, c$ are in H.P.
$\therefore \quad b=\frac{2 a c}{a+c} \Rightarrow a, b, c$ are in H.P.
Looking for more such questions to practice?
Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.