Show that the points `A (2, 3, 4)`, `B (1, 2, 3)`and `C (3, 8, 11)`are collinear.

Explanation

the given points are `(2,3,4),(1,2,3),(3,8,11)`

thus,

For AB,

direction ratios are, `-1,-1,-1`

For AC,

direction ratios are, `1,5,7`

Now, the ratios are proportional

thus, A is common point

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