Calculus

Given vectors u= (3, -4, 1) and v= (2, 1, -5)
Find:

a) u x v
b)|u x v|

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asked by Ariza
  1. you should have learned some type of algorithm or method of finding the cross product.

    About 2/3 of the way down this page is good illustration of a method

    http://www.ltcconline.net/greenl/Courses/107/vectors/dotcros.htm

    I got u x v = [19,17,11)

    you can check this to be correct by taking the dot product with each of the original vectors, it is correct.
    then | [19,17,11) |
    = √(361+289+121) = √771

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    posted by Reiny

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