Find the area of the parallelogram whose adjacent sides are determined by the vectors \( \vec{a}...

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Find the area of the parallelogram whose adjacent sides are determined by the vectors \( \vec{a}=\hat{i}-\hat{j}+3 \hat{k} \) and \( \vec{b}=2 \hat{i}-7 \hat{j}+\hat{k} \)
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