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## Homework Statement

Find 2 lines in R3 that are not parallel and do not intersect.

## Homework Equations

orthogonal: a.b=0

parallel: a=tb

## The Attempt at a Solution

(1,1,1) and (2,3,4)

(1,1,1).(2,3,4) = 7

and there does not exist a t such that

t(1,1,1) = (2,3,4)