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Math Help - parallel line equations

  1. #1
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    parallel line equations

    Two straight lines are given by

    r1 = lamda1(i + 2j - k)

    and

    r2 = i + lamda2(3i - 2j - 3k)

    Determine whether these lines are parallel to each other.
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  2. #2
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    Two lines are parallel if and only if their direction vectors are non-zero multiples of each other.
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