Results 1 to 2 of 2

Math Help - Vectors

  1. #1
    Junior Member
    Joined
    Feb 2009
    Posts
    34

    Vectors

    You are given that where
    and .
    Evaluate .
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member
    Joined
    Nov 2008
    Posts
    461
    Hello

    Quote Originally Posted by mr_motivator View Post
    You are given that where
    and .
    Evaluate .
    -4A - 3B = C

    <=> -3B = C+4A

    Do you know, what 4*A is? Its \begin{pmatrix} 4*6 & 4*4 \\ 4*(-9) & 4*10\end{pmatrix} = \begin{pmatrix} 24 & 16 \\ -36 & 40\end{pmatrix}


    -3B = C+4A = \begin{pmatrix}-33&-25\\30&-31 \end{pmatrix}+\begin{pmatrix} 24 & 16 \\ -36 & 40\end{pmatrix} =\begin{pmatrix}-33+24&-25+16\\30-36&-31+40\end{pmatrix}

    Therefor (dividing by -3 )

    B = \frac{-1}{3}* \begin{pmatrix}-33+24&-25+16\\30-36&-31+40\end{pmatrix}

    Greetings,
    Rapha
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 3
    Last Post: November 15th 2011, 05:10 PM
  2. Replies: 3
    Last Post: June 30th 2011, 08:05 PM
  3. Replies: 2
    Last Post: June 18th 2011, 10:31 AM
  4. [SOLVED] Vectors: Finding coefficients to scalars with given vectors.
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: January 23rd 2011, 12:47 AM
  5. Replies: 4
    Last Post: May 10th 2009, 06:03 PM

Search Tags


/mathhelpforum @mathhelpforum