Math 2250 - Elementary Linear Algebra

Homework #7 – Due Date April 12, 2007

Solve the system of equations:

3x + y - z + 2t = 9

x + y + z + t    = 3

x – y – z – t     = -1

7x+2y-z-6t     = -2

by Cramer’s rule. Compute all 5 determinants involved; use either elimination or cofactors at your choice.

Homework #6

Due Date: March 22nd, 2007

Problem Set 3.2:

Problems: 9, 11, 18, 32

Problem Set 3.3:

Problems: 2, 8, 10

Problem Set 3.4:

Problems: 1, 3, 4, 6, 30

Homework #5

Due Date: March 8th, 2007

Problem Set 3.1, Pages 118-121:

Problems: 10, 11, 20, 23, 24, 27

Problem Set 3.2, Pages 130-133:

Problems: 1, 5, 10

Homework #4, Due Date: February 15th, 2007

Problem Set 2.4, Page 68:

Problems: 21, 24

Problem Set 2.5, Pages 78-80:

Problems: 1, 2, 3, 8, 12, 27, 32

Problem Set 2.6, Pages 91-95:

Problems: 1, 2, 5, 6

Problem Set 2.7, Pages 105-107:

Problems: 2, 4, 17

Homework #3, Due Date: February 6th, 2007

Problem Set 2.2, Pages 41-44:

Problems: 25, 27

Problem Set 2.3, Pages 53-55:

Problems: 14, 15, 19, 24

Problem Set 2.4, Pages 65-66:

Problems: 3, 6

Problem Set 2.3: 1, 2, 3, 8, 9

Problem Set 2.4: 7, 8, 9, 11, 12, 15

Homework #2, Due Date: January 25, 2007

Problem Set 2.1, Pages 30-32:

Problems: 5, 10, 15

Problem Set 2.2, Pages 41-44:

Problems: 11, 13, 21

Problem Set 2.1: 12, 13, 18

Problem Set 2.2: 4, 7, 18

Homework #1, Due Date: January 18, 2007

Problem Set 1.1, Pages 7-10:

Problems: 1, 3, 27

Problem Set 1.2, Pages 17-20:

Problems: 1, 2, 3, 6, 12