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Question

What vector must be added to the two vectors ^i2^j+2^kand2^i+^j^k, so that the resultant may be a unit vector along x-axis


  1. 2^i+jk

  2. 2^i+jk
     

  3. 2^ij+k
     

  4. 2^ijk


Solution

The correct option is B

2^i+jk
 


(^i2^j+2^k)+(2^i+^j^k)+R=i
Required vector R=2^i+jk

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