2. In each case: if A is invertible, find its inverse and express it as a...

Transcribed Image Text:

2. In each case: if A is invertible, find its inverse and express it as a product of elementary matrices; if it isn't, find and express its Smith Normal Form. [7 42 28 (b) A =2 12 -7 10 60 63 7 (a) A -5 -24 -28 10 60 63 4. For cach of the two matrices in question 2: if A is invertible, use the inverse of A to solve the system Af = Note: at least one of the two matrices in question 2 is invertible, so "neither is invertible" is not a valid answer to this question. Solving the system by row reduction is also not an acceptable answer. 2. In each case: if A is invertible, find its inverse and express it as a product of elementary matrices; if it isn't, find and express its Smith Normal Form. [7 42 28 (b) A =2 12 -7 10 60 63 7 (a) A -5 -24 -28 10 60 63 4. For cach of the two matrices in question 2: if A is invertible, use the inverse of A to solve the system Af = Note: at least one of the two matrices in question 2 is invertible, so "neither is invertible" is not a valid answer to this question. Solving the system by row reduction is also not an acceptable answer.