Question: Let A = (a, b) be a fixed point in the plane, and let A (P) be the distance from A to the point

Let A = (a, b) be a fixed point in the plane, and let ƒ_A(P) be the distance from A to the point P = (x, y). For P ≠ A, let e_AP be the unit vector pointing from A to P (Figure 27):

y Distance f(x, y) A = (a, b) e AP P= (x, y) - X

y Distance f(x, y) A = (a, b) e AP P = (x, y) - X

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