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Lecture 6

MAT 114 Lecture Notes - Lecture 6: Invertible Matrix, Immunoglobulin G, Gaussian Elimination


Department
Mathematics
Course Code
MAT 114
Professor
Lisa Holden
Lecture
6

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SECTION 4.3 Matrix inversion
The inversion of an Nx 72 matrix
Ais that 22 72 matrix Ai
which when multiplied by Aon
either side yields the 72 72
idenity matrix I
AAAt AI
lRAwas an inverse it is said
to be invertible Otherwise it
is said to be singular
NOTE If we discovered that NB L
then we know that Ais the inverse
of Band Bis the inverse of A
We then call Aand Ban

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INVERSE PAIR OF MATRICES
1
EXCERISE 4
Determine whether or not the
given pairs of matrices are
inverse pairs
atoo if
Ii
as II

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IOO
Igg gI
SO AtBform on inverse
matrices You could say that
faith nor
entry
Yeaim
example
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