Exercise 2.2.12

Answers

Elimination leads to this upper triangular system; then comes back substitution.

\begin{aligned} 2 x + 3 y + z & = 8 & x = 2 \\ y + 3 z & = 4 & gives & y = 1 If a zero is at the start of row 2 or row 3, \\ 8 z & = 8 & z = 1 that avoids a row operation. \end{aligned}

mathchakra

2021-11-20 14:55