Answer:
A. If 2a is the length of the transverse axis, then |d(P,F₁) -d(P,F₂)| = 2a
Step-by-step explanation:
A hyperbola is a curve such that the difference of distances from a point on the curve to two fixed points is a constant. Those two fixed points are the foci. The constant is the length of the transverse axis. (Consider the point being a vertex, for example, to see this is true.)
