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Homework Statement
We have [itex]A \in R^{mxm} \text{ and } b \in R^{m} \text{ and } b \neq 0 \text{. Show that } Ax = b \text{ and } A(x+ \delta x) = b+ \delta b [/itex]
The Attempt at a Solution
I did the first part just by the definition of A being non singular. The second part is tripping me up though. Not sure how to tackle it. I looked at the backwards stability but it just confused me more. Any help would be most appreciated.
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