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**TARAJS****Member**- Registered: 2011-12-01
- Posts: 19

Suppose f is a coordinate function for l=(line) AB such that f(A)=0 and f(B)>0. Prove that (ray) AB={P (is an element of) l such that f(P) >=0}

Hint: the definition of ray: the ray AB is the set of points = Segment AB union {P: A*B*P}

HELP PLEASE. This all has to do with Neutral Geometry if that helps any.

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