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02-06-2023
Business

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Given the matrix R = ( 2 −1 1 3 ), i. show that R is non-singular. (1 mark) ii. find R-1 , the inverse of R. (2 marks iii. show that RR-1 = I. (2 marks) B. Use the matrix method or otherwise to solve the following system of simultaneous equations : i. x + 2y + 3z = – 5 ii. 3x + y – 3z = 4 iii. – 3x + 4y + 7z = – 7

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