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\overset{⇀}{O A} = 5 \hat{i} - 2 \hat{j} + 6 \hat{k}

\vec{O B} = 7 \hat{i} - 5 \hat{j} + 8 \hat{k}

\vec{A B} = ?

12 \hat{i} - 7 \hat{j} + 6 \hat{k}

- 2 \hat{i} - 7 \hat{j} + 6 \hat{k}

2 \hat{i} - 3 \hat{j} + 2 \hat{k}

12 \hat{i} + 7 \hat{j} + 6 \hat{k}

ANS : 3

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