anonymous
  • anonymous
find the matrix |7 -7 -2| |9 4 8| |7 2 -7| |9 -3 1| |7 -7 3 | |-5 3 7|
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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yuki
  • yuki
you already have the matrices
yuki
  • yuki
are you adding them or something ?
anonymous
  • anonymous
the question find the matrix product , if possible ? can u explain for me a lit bit

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yuki
  • yuki
that's a really tough one, so it might take a while for me to use the equation button, so hold on a sec, ok ?
anonymous
  • anonymous
sure
anonymous
  • anonymous
Make the 3 matrices and add them all together. http://en.wikipedia.org/wiki/Matrix_multiplication#Alternative_descriptions
yuki
  • yuki
when you multiply a a*b matrix to a b*c matrix, you will always get a a*c matrix
yuki
  • yuki
in your case you are doing 3*3 and 3*3 so you will have a 3*3 matrix as an answer
yuki
  • yuki
now to determine the entrees, this is the step that you have to do
yuki
  • yuki
the
yuki
  • yuki
\[a_11\]
yuki
  • yuki
\[a_{11}\]
mathmagician
  • mathmagician
When multiply, you get 10 43 35 116 1 9 -15 58 70, if that was the question
yuki
  • yuki
term can be figured out by multiplying the 1st row from the first matrix and the 1st column of the second matrix
yuki
  • yuki
so you 7*9 + -7*9 + -2*-5 =10
amistre64
  • amistre64
[abc] * [d] [e] = a.d + b.e + c.f [f]
yuki
  • yuki
\[a_{12}\]
yuki
  • yuki
will be calculated by 7*4 + -7*-3 + -2*3
yuki
  • yuki
and so forth

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