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The vector which can give unit vector along X-axis with A = 2î - 4j + 7k,
R = 7+2j – 5k and Ć = - 4î+ 7 + 3î
-41 - 57 - 5k 2) 4² +57 -
5 3 ) 4 - 5 +
5O 4) none
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