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General

General

Easy

Question

If unit vector $a equals a subscript 1 i with not stretchy hat on top plus a subscript 2 j with not stretchy hat on top plus a subscript 3 k with not stretchy hat on top$ . The possible values of a₁ a₂ and a₃ are

$a_{1} = \frac{2}{3}, a_{2} = \frac{2}{3} and a_{3} = \frac{1}{3}$
$a_{1} = 0.3, a_{2} = 0.4 and a_{3} = \frac{\sqrt{3}}{2}$
$a_{1} = - \frac{2}{3}, a_{2} = \frac{2}{3} and a_{3} = - \frac{1}{3}$
All the above

The correct answer is: All the above

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