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Vectors and Matrices question

2018 · Q29
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Vectors and Matrices question

2018 · Q29

IIT JAMChemistryVectors and MatricesMCQ+2 / −0.67
A vector A⃗=i⃗+xj⃗+3k⃗\vec{A} = \vec{i} + x\vec{j} + 3\vec{k}A=i+xj​+3k is rotated through an angle and is also doubled in magnitude resulting in B⃗=4i⃗+(4x−2)j⃗+2k⃗\vec{B} = 4\vec{i} + (4x - 2)\vec{j} + 2\vec{k}B=4i+(4x−2)j​+2k. An acceptable value of xxx is
  1. A
    1
  2. B
    2
  3. C
    3
  4. D
    43\frac{4}{3}34​
View written solutionFree

Correct answer: B

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