Find the unit vector in the direction of the vector $^i +^j + 2^k$

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Solution

Unit vector in the direction of the vector
$^i +^j + 2^k = \pm \frac{^i +^j + 2^k}{\sqrt{1^{2} + 1^{2} + 2^{2}}} = \pm \frac{^i +^j + 2^k}{\sqrt{6}}$

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