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Parabola part 4 : ques?
Q4.A variable chord PQ of the parabola , y^2 = 4x is drawn parallel to the line y = x .If the parameters of the points P and Q on the parabola be p and q respectively , then (p+q) =
A. 1
B 0.5
C. 2
D. 4
Please explain Your answers
1 Answer
Relevance
- 1 decade agoFavorite Answer
the slope of line joining two points with parameters p and q is 2/(p+q). (you can get it by usuiing slope formula for the two points,viz (p^2,2p) and (q^2,2q)
So 2/(p+q)=1
p+q=2;
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