# ch5-ques - ECON 331 Tutorial Questions #2 Problem 1 Find AB...

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ECON 331 Tutorial Questions #2 Problem 1 Find AB = C If A = 510 21 1 ¸ and B = 43 11 02 Problem 2 Find both C = AB and D = BA if A = 12 ¸ and B = 10 ¸ Problem 3 Find the determinant by LAPLACE Expansion of A = 123 01 1 Problem 4 Find the inverse of A using the formula A 1 = 1 | A | AdjA if A = 23 ¸ Problem 5 Find the inverse of A using the formula A 1 = 1 | A | AdjA if A = 91 14 327 61 04 Problem 6 Solve the system Ax = d by matrix inversion, where 4 x +3 y =28 2 x +5 y =42 Problem 7 Solve for x 1 ,x 2 3 using Cramer’s rule 4 x 1 + x 2 5 x 3 =8 2 x 1 x 2 + x 3 =12 3 x 1 x 2 +4 x 3 =5 Problem 8 Consider the following macroeconomic model: goods market
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## This note was uploaded on 09/13/2009 for the course EOCNOMICS Econ 331 taught by Professor Kelvinkwainger during the Spring '09 term at Simon Fraser.

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