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\bar{A} = 2 \bar{i} + 2 \bar{j} + \bar{k}

\bar{B} = 2 \bar{i} + 10 \bar{j} - 11 \bar{k}

\frac{1}{\sqrt{2} 9} (2 \bar{i} + 3 \bar{j} + 4 \bar{k)}

\frac{4}{\sqrt{29}} (2 \bar{i} + 3 \bar{j} + 4 \bar{k)}

\frac{4}{\sqrt{29}} (4 \bar{i} + 3 \bar{j} + 2 \bar{k)}

\frac{4}{\sqrt{29}} (- 4 \bar{i} + 3 \bar{j} + 2 \bar{k)}

\frac{4}{\sqrt{29}} (- 4 \bar{i} + 3 \bar{j} - 2 \bar{k)}

ANS : 4

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