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[" 11.Show that the line joining the poi...

[" 11.Show that the line joining the points: "P" and "Q" with position "],[" vectors "vec p=p_(1)hat i+p_(2)hat j+p_(3)hat k" and "vec q=q_(1)hat i+q_(2)hat j+q_(3)hat k" passes "],[" through the origin if "vec p*vec q=|vec p||vec q|]

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