Homework5-matrices - Math 1508 Problem Set 5 Problem 1[sec 8.1 Use matrices and Gauss-Jordan elimination to solve the system of equation 3 = 14 cfw 2 3

Homework5-matrices - Math 1508 Problem Set 5 Problem 1[sec...

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Week 5 Fall 2013 Math 1508 Problem Set 5 Problem 1 [sec 8.1]: Use matrices and Gauss-Jordan elimination to solve the system of equation: { −? + ? − 3? = −14 2? − 3? + ? = 21 3? + 2? + 4? = 19 Problem 2 [sec 8.2-8.3]: True or False [You must justify your answer mathematically] a. Two matrices can be added only when they have the same order. b. Matrix multiplication is commutative.

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