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Math Help - vectors

  1. #1
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    vectors

    1. find a single vector equal to the following

    a) -3(4,-9)-9(2,3)
    b) \frac{-1}{2}(6,-2)+\frac{2}{3}(6,15)

    2. given \vec{x} = 2\vec{i}-\vec{j} and \vec{y}=\vec{-i}+5\vec{j} find a vector equivalent to each of the following

    a) 3\vec{x}-\vec{y}
    b) 2(\vec{x}+3\vec{y})-3(\vec{y}+5\vec{x})
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  2. #2
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    Quote Originally Posted by william View Post
    1. find a single vector equal to the following

    a) -3(4,-9)-9(2,3)
    b) \frac{-1}{2}(6,-2)+\frac{2}{3}(6,15)

    2. given \vec{x} = 2\vec{i}-\vec{j} and \vec{y}=\vec{-i}+5\vec{j} find a vector equivalent to each of the following

    a) 3\vec{x}-\vec{y}
    b) 2(\vec{x}+3\vec{y})-3(\vec{y}+5\vec{x})
    Do you understand that these involve nothing more than integer arithmetic?
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  3. #3
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    Quote Originally Posted by HallsofIvy View Post
    Do you understand that these involve nothing more than integer arithmetic?
    what are you talking about?
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