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Algebra 24 Online
OpenStudy (anonymous):

OA ( Pi + 1j +1k ) and OB ( 4i + 2i + Pk) In the case where OAB is a straight line, state the value of p and find the unit vector in the direction of OA.

ganeshie8 (ganeshie8):

If OAB is a straight line, OA || OB so the components will be proportional : P/4 = 1/2 solve P

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