The volume of the tetrahedron whose vert...

The volume of the tetrahedron whose vertices are the points with positon vectors `hati-6hatj+10hatk, -hati-3hatj+7hatk, 5hati-hatj+hatk` and `7hati-4hatj+7hatk` is 11 cubic units if the value of `lamda` is

-1

-7

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