MediumLinear systems

Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §11.4 Matrices and Linear Equations, #22 · Linear Algebra · Linear systems

In Problem 21 what is special about … and … (the sums…

In Problem 21 what is special about $a_{1} + a_{2}$ and $b_{1} + b_{2}$ (the sums down the columns of $A$ )? Explain why $d_{1} + d_{2}$ equals $x + y$ .

This exercise builds on another exercise in its source book, which isn't shown here.

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §11.4 Matrices and Linear Equations, #22

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