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The value of x if (i + j + k) is a unit vector is

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+1 vote
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in Mathematics by (48.5k points)

The value of x if (i + j + k) is a unit vector is

(1) ± 3

(2) ±1/2

(3) ±1/√3

(4) ± 3

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1 Answer

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Best answer

Correct option (3) ± 1/√3

Explanation:

x2 + x2 + x2 = 1

3x2 = 1

x2 = 1/3

x = ± 1/√3.

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