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If A + B is a unit vector along x-axis and A = i-j+k, then what is B ?(a) j+k(b) j-k |
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Answer» we have to find that vector, which on adding to A = i-j+k , gives one as magnitude so the best answer is option b => i-j+k +(j-k) = i-j+k+j+k = i, and |i| = 1 |
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