Find A-1, if A = 1251-1-123-1 .Hence, solve the following system of linear equations:x + 2y + 5z = 10, x – y – z = – 2,2x + 3y – z = – 11

Find $A^{- 1}$ , if A = $[\begin{matrix} 1 & 2 & 5 \\ 1 & - 1 & - 1 \\ 2 & 3 & - 1 \end{matrix}]$ .Hence, solve the following system of linear equations:

x + 2y + 5z = 10, x – y – z = – 2,
2x + 3y – z = – 11

Matching exercise

Match the items on the right to the items on the left.

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