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Math Help - combining vectors

  1. #1
    Junior Member
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    Exclamation combining vectors

    if a=<1,-1,2> b=<3,2,1> and c=<3,1>

    is it possible to add (a+c) or |a|+ |c| ?

    is it possible to do: (a dot a) x b ?
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  2. #2
    Super Member redsoxfan325's Avatar
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    Quote Originally Posted by cottekr View Post
    if a=<1,-1,2> b=<3,2,1> and c=<3,1>

    is it possible to add (a+c) or |a|+ |c| ? No, Yes
    is it possible to do: (a dot a) x b ? No
    Vectors need to be the same dimension to add them or take the cross product or dot product of them. |a| and |c| are both real numbers, so adding them is fine.
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