Prove that the chord joining the points P(cp , c/p) and Q(cq ,c/q) on the rectangular hyperbola xy = c^2 has theequation pqy + x = c(p + q). Given that the points P, Q and R lieon the hyperbola xy = c^2, prove that (a) if PQ and PR are inclined equally to the coordinate axes,then QR passes through O, (b) if angle QPR is a right anglr, then QR is perpendicular tothe tangent at P.

Alduccii2

Alduccii2

Answered question

2022-07-27

Prove that the chord joining the points P(cp , c/p) and Q(cq ,c/q) on the rectangular hyperbola x y = c 2 has the equation pqy + x = c(p + q). Given that the points P, Q and R lieon the hyperbola x y = c 2 , prove that:
(a) if PQ and PR are inclined equally to the coordinate axes,then QR passes through O,
(b) if angle QPR is a right anglr, then QR is perpendicular tothe tangent at P.

Answer & Explanation

Kendrick Jacobs

Kendrick Jacobs

Beginner2022-07-28Added 16 answers

The chord joining points (cp,c/p) Q(cq,c/q) on x y = c 2 is ( x-cp)/cq-cp =(y-c/p)/c/q-c/p
(x-cp)/-1 =(y-c/p)pq cross multiply and simplify we get x+pqy=c(p+q)

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