\input epsf
\nopagenumbers
\magnification=\magstep1

\noindent {\bf Problem statement} Determine the equation for the set
of all points $\,(x,y)\,$ so that the distance of $\,(x,y)\,$ from
$\,(4,0)\,$ is twice the distance of $\,(x,y)\,$ from $\,(1,0).$
Describe the set geometrically.

% Contributed by Michael O'Nan








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