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in Mathematics by (79.0k points)

If A  = [(2,-3,5)(3,2,-4)(1,1,-2)], find A–1. Use it to solve the system of equations

2x – 3y + 5z = 11

3x + 2y – 4z = – 5

x + y – 2z = – 3.

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|A| : – 1 ≠ 0 :.  A–1 exists

Co-factors of A are :

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