A line of fixed length l moves so that its ends are on the coordinate axes. Determine the locus of P on this line which divides it in the ratio m:n. What is the locus if m=n?
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Here are some hints.
First say that are the endpoints of the segment on the x-axis and on the y-axis respectively.
Because the line segment has constant length .
If then is the midpoint of the segment, so .
As and visa versa.
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