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Math Help - Finding the Norm

  1. #1
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    Finding the Norm

    I was wondering if someone could step me through the following question:

    Express v= (2, 1, -3) as a linear combination of i, j and k and find the norm of v.
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  2. #2
    MHF Contributor red_dog's Avatar
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    If \overrightarrow{v}=(a,b,c), then \overrightarrow{v}=a\cdot\overrightarrow{i}+b\cdot  \overrightarrow{j}+c\cdot\overrightarrow{k}

    and |\overrightarrow{v}|=\sqrt{a^2+b^2+c^2}
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