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Eamcet Mathematics
Co - ordinate Geometry Parabola
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Q.
Tangents drawn at the ends of any focal chord of a parabola y
2
=4ax intersect in the line
A.
y-a=0
B.
y+a=0
C.
x-a=0
D.
x+a=0
E.
None of the above
View Answer
Correct choice: C
Explanation:
Semi latus rectum is harmonic mean between segments of focal chords of a parabola.∴ b=2ac/a+c ⇒ a, b, c are in H.P.
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