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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §11.4 Matrices and Linear Equations, #40 · Linear Algebra · Linear systems

Solve equation (14) to find the combination … of … and …

Solve equation (14) to find the combination $x a + y b$ of $a = (1, 1, 1)$ and $b = (- 1, 1, 2)$ that is closest to $d = (1, 1, 3)$ . Draw the corresponding straight line for the data points $(- 1, 1), (1, 1)$ , and $(2, 3)$ . What is the vector of three errors and what is it perpendicular to?

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §11.4 Matrices and Linear Equations, #40

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