Finite Math Examples

${[\begin{array}{c} 1 & 7 & - 7 & - 1 \\ 4 & 1 & 1 & 6 \\ 4 & - 1 & 1 & - 1 \\ 1 & - 1 & - 4 & 6 \end{array}]}^{- 1} [\begin{array}{c} 30 \\ 6 \\ 4 \\ 13 \end{array}]$

Step 1

Rewrite the expression using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{1}{[\begin{array}{c} 1 & 7 & - 7 & - 1 \\ 4 & 1 & 1 & 6 \\ 4 & - 1 & 1 & - 1 \\ 1 & - 1 & - 4 & 6 \end{array}]} [\begin{array}{c} 30 \\ 6 \\ 4 \\ 13 \end{array}]$