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Linear Algebra Solutions 92

# Linear Algebra Solutions 92 - z C T d 4 d 4444 Qd4 4 O 4d 4...

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¢ ¢ ¢ ¢ ¢ ¢fi - 6 y z x O @ @ @ @ @ @ @ @ @ @ @ M L ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ " " " " " " " " " " " " " " " " " " " " " " P P P P P P P P P D C Q P @ ¡ " " where ˆ n = 1 PQ - PQ is a unit vector which is orthogonal to X and Y . Hence ˆ n = t ( X × Y ) , where t = ± 1 / || X × Y || . Hence PQ = | - AB · ( X × Y ) | || X × Y || . 17. We use the formula of the previous question. Line L has the equation P = A + sX , where
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