x का मान क्या होगा यदि \(\rm x(\widehat i + \widehat j + \widehat k)\) एक इकाई सदिश है?

1
\( \pm \frac{1}{3}\)
2
± 3
3
\(\pm \sqrt 3\)
4
\( \pm \frac{1}{{\sqrt 3 }}\)

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