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Determine whether the pair of vectors is orthogonal.
--4, -1 , -8, 32 1
Contra-
A prefix meaning against, opposite or contrasting.
Endo-
A prefix meaning within or inside, used in medical and scientific terms to denote inner structures or conditions.
Inter-
A prefix meaning 'between' or 'among'.
Ex-
A prefix often denoting out of, from, or not having something.
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