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    wasp88's Avatar
    wasp88 Posts: 2, Reputation: 1
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    #1

    Mar 13, 2011, 02:21 PM
    for which value of s is the vector[1,2,s] orthogonal to [-1,1,1]? How you solve it
    for which value of s is the vector[1,2,s] orthogonal to [-1,1,1]? How you solve it
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Mar 13, 2011, 03:02 PM

    Take the dot product of

    and

    Set it to 0 and solve for s. The dot product results in a very easy equation to solve for s.
    wasp88's Avatar
    wasp88 Posts: 2, Reputation: 1
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    #3

    Mar 13, 2011, 06:08 PM
    Thanks it really helped me
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