According to ques,
Points are
![\[~A\text{ }\left( 0,\text{ }1,\text{ }1 \right)\text{ }and\text{ }B\text{ }\left( 4,\text{ }5,\text{ }1 \right)\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-f69fa2f6b43a1a2c3bd775a35c29a977_l3.png "Rendered by QuickLaTeX.com")
![\[C\text{ }\left( 3,\text{ }9,\text{ }4 \right)\text{ }and\text{ }D\text{ }\left( \text{ }4,\text{ }4,\text{ }4 \right).\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-a54953f31a62b85b4a85145b902a5685_l3.png "Rendered by QuickLaTeX.com")
Therefore, Cartesian form of equation AB is
Prove that the line through A (0, –1, –1) and B (4, 5, 1) intersects the line through C (3, 9, 4) and D (– 4, 4, 4).
Prove that the line through A (0, –1, –1) and B (4, 5, 1) intersects the line through C (3, 9, 4) and D (– 4, 4, 4).