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What is the value of p for which the vector p(2 i - j +2 k ) is of 3 units length?

Options

  1. A1
  2. B2
  3. C3
  4. D6

Correct answer

A. 1

Step-by-step solution

Length of given vector aligned P |(2 i - j +2 k )| & =3 P (2)^2+(1)^2+(2)^2 & =3 P 3=3 P & =1 aligned

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