Question

A fixed Circle C1 with equation (x-1)^2 + y^2 = 1 and a shrinking circle C2 with radius r and center the origin. P is the point (0,r), Q is the upper point of intersection of the two circles, and R is the point of intersection of the line PQ and the x-axis. what happense to R as C2 shrinks, that is, as r-->0^+?