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PLEASE HELP!!! Does anyone know how to do "Matrices" It's in algebra
 one year ago
 one year ago
PLEASE HELP!!! Does anyone know how to do "Matrices" It's in algebra
 one year ago
 one year ago

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amistre64Best ResponseYou've already chosen the best response.0
\[spose:~A=(a_1~a_2)~and~B=\binom{b_1}{b_2}~then~AB=a_1b_1+a_2b_2\]
 one year ago

amistre64Best ResponseYou've already chosen the best response.0
if we let A have so many Rows, and B have so many columns then: then AB is: \[Row_1.Col_1~~Row_1C.Col_2~~Row_1.Col_3\\ Row_2.Col_1~~Row_2C.Col_2~~Row_2.Col_3\\ Row_3.Col_1~~Row_3C.Col_2~~Row_3.Col_3\\ \]
 one year ago

jon.stromer.galleyBest ResponseYou've already chosen the best response.1
To multiply A and B you can think of sending the rows of B into the columns of A by kind of rotating B counter clockwise. In your diagram, the result of AxB will be a 3x3 matrix as follows: (8*5 + 2*6), (0*5 + 6*6), (3*5 + 4*6) (8*2 + 2*3), (0*2 + 6*3), (3*2 + 4*3) (8*4 + 2*0), (0*4 + 6*0), (3*4 + 4*0)
 one year ago

jon.stromer.galleyBest ResponseYou've already chosen the best response.1
Question (7) specifically, but the technique can be used in general and is what Amistre64 has stated quite nicely.
 one year ago
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