The vector (s) which is (are) coplanar with vectors \( \mathrm{P} \...

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The vector (s) which is (are) coplanar with vectors
\( \mathrm{P} \) \( \hat{i}+\hat{j}+2 \hat{k} \) and \( \hat{i}+2 \hat{j}+\hat{k} \), and perpendicular to the

W vector \( \hat{i}+\hat{j}+\hat{k} \), is/are:
(1) \( \hat{j}-\hat{k} \) and \( -\hat{j}+\hat{k}(2)-\hat{i}+\hat{j} \) and \( \hat{i}-\hat{j} \)
(3) \( \hat{i}-\hat{j} \) and \( \hat{j}-\hat{k} \)
(4) \( -\hat{j}+\hat{k} \) and \( -\hat{i}+\hat{j} \)
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