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$If the vectors \vec{a} = 3 \hat{i} + \hat{j} - 2 \hat{k}, \vec{b} = - \hat{i} + 3 \hat{j} + 4 \hat{k} and \vec{c} = 4 \hat{i} - 2 \hat{j} - 6 \hat{k} constitute the$
$sides of a ∆ A B C, then the length of the median bisecting the vector \vec{c} is$

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Correct option is D

The median bisecting the vector c →=122b2→+2a2→-c2→ =122(26)+2(14)-56=1224=6

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If the vectors a→=3i^+j^-2k^,b→=-i^+3j^+4k^ and c→=4i^-2j^-6k^ constitute the sides of a ∆ABC, then the length of the median bisecting the vector c→ is

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$If the vectors \vec{a} = 3 \hat{i} + \hat{j} - 2 \hat{k}, \vec{b} = - \hat{i} + 3 \hat{j} + 4 \hat{k} and \vec{c} = 4 \hat{i} - 2 \hat{j} - 6 \hat{k} constitute the$
$sides of a ∆ A B C, then the length of the median bisecting the vector \vec{c} is$