The discussion focuses on calculating the (2,3) entry of the inverse of matrix A, defined as A=[1 2 1; 0 4 3; 1 2 2]. Participants confirm that to find this entry, one must compute the quotient of the (2,3) entry of the adjugate matrix adj(A) and the determinant det(A). The confusion regarding whether to compute the entire inverse A^(-1) is clarified, emphasizing that only the specific entry is required.
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Mdhiggenz said:Homework Statement
Given A=[1 2 1; 0 4 3; 1 2 2]
determine the (2,3) entry of A-1 by computing a quotient of two determinants.
This problem confused me a bit, do they just want us to divide the adj(A) by the det(A) in order which would give us A-1 and just state the (2,3) entry from there?
Thanks
Higgenz
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