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Question: Answered & Verified by Expert
If $t_1$ and $t_2$ be the parameters of the end points of a focal chord for the parabola $y^2=4 a x$, then which one is true?
MathematicsParabolaWBJEEWBJEE 2010
Options:
  • A $\mathrm{t}_1 \mathrm{t}_2=1$
  • B $\frac{t_1}{t_2}=1$
  • C $\mathrm{t}_1 \mathrm{t}_2=-1$
  • D $\mathrm{t}_1+\mathrm{t}_2=-1$
Solution:
2473 Upvotes Verified Answer
The correct answer is: $\mathrm{t}_1 \mathrm{t}_2=-1$
Hints : $\mathrm{t}_1 \mathrm{t}_2=-1$ Fact

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