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SHOW THAT THE VECTORS 2 𝐢̂-𝐣̂+𝐤̂ AND 𝐢̂-3 𝐣̂-5 𝐤̂ ARE AT RIGHT ANGLES.
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Show that the vectors 2 𝐢̂-𝐣̂+𝐤̂ and 𝐢̂-3 𝐣̂-5 𝐤̂ are at right angles.
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