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Let ¯u,¯v,¯w be such that |¯u|=1,|¯v|=2,|¯w|=3 If the projection ¯v along ¯u is equal to that of ¯w along ¯u and ¯v,¯w are perpendicular to each other then |¯u¯v+¯w| equals


( A ) 14
( B ) 7
( C ) 2
( D ) 14

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