The lines and have vector equations

respectively, where is a constant such that , and and are real parameters.

The points P is on and Q on are such that PQ is perpendicular to both lines.

Show that for all values of ,

Thanks you.

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- Jul 13th 2010, 08:29 PMacc100jtVector equation (Challenging)
The lines and have vector equations

respectively, where is a constant such that , and and are real parameters.

The points P is on and Q on are such that PQ is perpendicular to both lines.

Show that for all values of ,

Thanks you.