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Which one of the following is the unit vector perpendicular to both a =- i + j + k and b =- i - j + k ?

Options

  1. Ai + j 2
  2. Bk
  3. Cj + k 2
  4. Di - j 2

Correct answer

A. i + j 2

Step-by-step solution

The correct answer is option (A)

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