vectors-m

Question: The perimeter of the triangle whose vertices have the position vectors $(\mathbf{i}+\mathbf{j}+\mathbf{k}),\,\,(5\mathbf{i}+3\mathbf{j}-3\mathbf{k})$ and $(2\mathbf{i}+5\mathbf{j}+9\mathbf{k}),$ is given by



1) $15+\sqrt{157}$
2) $15-\sqrt{157}$
3) $\sqrt{15}-\sqrt{157}$
4) $\sqrt{15}+\sqrt{157}$
Solution: Explanation: No Explanation
Modulus of vector Algebra of vectors

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