multiplying matrices
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Matrices
Multiply: [■(1&2@3&0)][■(1@-1)] =
Multiply: [■(-1&2@3&1)][■(2&4@3&1)] =
Matrix A shows number of stocks holding by William and Michael:
Matrix B shows price in dollars per share:
Find inverse to the given matrix
(see instructions on Blackboard in Course Material section for week 5):
[■(2&3@3&5)]
Use Excel function MINVERSE to find inverse to the given matrix
(see instructions on Blackboard in Course Material section for week 5):
[■(1&-1&3@2&1&2@-2&-2&1)]
Find solution for the matrix equation [■(2&5@1&3)][■(x@y)] = [■(3@2)] using inverse matrix.
Tip: for matrix A = [■(2&5@1&3)] find inverse matrix A-1 .
Then multiply inverse matrix A-1 by column [■(3@2)]
[■(x@y)]= A^(-1)*[■(3@2)]
See examples posted on Blackboard in Course Material section for week 5.
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