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Math Help - Vectors help

  1. #1
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    Vectors help

    Given that a = 2i + j and b =i + 3j find

    a)  \lambda if  a + \lambda b is parrallel to the vector i

    b)  \mu if  \mu a + b is parrallel to the vector j

    ?
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  2. #2
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    Quote Originally Posted by Tweety View Post
    Given that a = 2i + j and b =i + 3j find

    a)  \lambda if  a + \lambda b is parrallel to the vector i

    b)  \mu if  \mu a + b is parrallel to the vector j

    ?
    ai+ bj and ci+ dj are parallel if and only if a/b= c/d.
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  3. #3
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    Quote Originally Posted by HallsofIvy View Post
    ai+ bj and ci+ dj are parallel if and only if a/b= c/d.
    I am still not sure how I work out the value of  \lambda , how do I get 'rid' of the j component ?
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