The iden.y matrix for is because . Back in multiplication, you know that 1 is the iden.y element for multiplication. Whenever the iden.y element for an operation is the answer to a problem, then the two items operated .When we multiply a matrix by its inverse we get the Iden.y Matrix which is like "1" for matrices :.Page 4.4 Iden.y and Inverse Matrices 223 Iden.y and Inverse Matrices USING INVERSE MATRICES The number 1 is the multiplicative iden.y for real numbers because 1 a= aand.Yes, Iden.y and Inverse Matrices isnt particularly exciting. But it can, at least, be enjoyable. We dare you to prove us wrong..
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When we multiply a matrix by its inverse we get the Iden.y Matrix which is like "1" for matrices :.