chrisplusian
  • chrisplusian
Linear algebra question dealing with transpose
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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chrisplusian
  • chrisplusian
I can't figure out how to input matrices here but \[b = \left[\begin{matrix}1 \\ 1 \\ -1 \end{matrix}\right]\]
chrisplusian
  • chrisplusian
i figured it out..... find \[b^{T}b\]
chrisplusian
  • chrisplusian
what I got was a three by three \[\left[\begin{matrix}1 & 1 & -1\\ 1 & 1 & -1\\ -1 & -1 & 1\end{matrix}\right]\]

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chrisplusian
  • chrisplusian
just wanted to check and see if this is correct
dan815
  • dan815
it should say b*b^T if u got that
dan815
  • dan815
3 by 1 matrix * 1by 3 matrix = 3 by 3 matrix, ^--------^---- these inner dimensions have to be equal, that is a way to check if solution exists
dan815
  • dan815
rows by columns
chrisplusian
  • chrisplusian
Sorry that is correct it should have said b*b^T
chrisplusian
  • chrisplusian
would that be correct for b*b^T ?
dan815
  • dan815
yes its right
chrisplusian
  • chrisplusian
thank you
dan815
  • dan815
okay but btw
dan815
  • dan815
if u do b^t * b you will get 3
chrisplusian
  • chrisplusian
Yeah I actually did that problem first, for some reason I was second guessing myself on this part though
dan815
  • dan815
ah okay

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