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Question 1
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The area of the triangle formed by the vertices whose position vectors are $3\widehat{i}+\widehat{j}$ , $5\widehat{i}+2\widehat{j}+\widehat{k}$ , $\widehat{i}-2\widehat{j}+3\widehat{k}$ is
A.
$\sqrt[]{21}$ sq. units
B.
$\sqrt[]{23}$ sq. units
C.
$\sqrt[]{33}$ sq. units
D.
$\sqrt[]{29}$ sq. units
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