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If straight A with rightwards arrow on top equals 3 straight i with not stretchy hat on top plus 4 straight j with not stretchy hat on top plus 9 straight k with not stretchy hat on top is multiplied by 3, then the component of the new vector along z directions is

PhysicsGeneral

  1. -3
  2. +3
  3. -27
  4. +27

    Answer:The correct answer is: -27

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