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    Part c, I don't know why they used:
    .(3i -j +2k)
    really puzzled about the '2'.......
    (file a3 is the question and a3so is the solution)
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    You found that q=2, so the direction vector of l is (3, -1, 2). Since OC is perpendicular to l, then:
    OC . direction vector of l = 0
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    One more thing:
    dx/du = 2u
    Can this be written as: dx = 2u du ?
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    (Original post by [email protected])
    One more thing:
    dx/du = 2u
    Can this be written as: dx = 2u du ?
    Yes, for all intents and purposes.
 
 
 
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Updated: June 27, 2005
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