Quote:

Originally Posted by

**Griftrix**
It is. But you will only understand that if you understand that 0.9 repeating is a real number, not something that approaches a number. Without that understanding it may be hard to grasp.

P(cp, c/p) lies on the rectangular hyperbola xy=c^2. Lines drawn from the foci S and S' are perpendicular to tangent at P, and meet the hyperbola at A, B, C, D.

find the coordinates of point A.