### Linear Algebra Math 2270-004 Spring 2018 Homework Page

Department of Mathematics
College of Science
University of Utah

Homework assignments will be posted Wednesdays , a week before they are due - you will have a weekly quiz based on the homework problems, lab work, and the concepts they test, at the end of class on Wednesdays. A subset of the weekly homework problems are underlined and bold-face, and at the start of class on Wednesdays you will hand in carefully written up solutions to this subset of the homework. There will also be lab worksheets. These problems will be handed out in your lab meetings, and due at the start of lab the following week.
homeworkguidelines.pdf for written homework (thanks to Victor Camacho from a class a long time ago).

Due January 17
hw1.pdf
Grading: 20 points possible, distributed as follows:
1.1: 13, 17, 33 = 2 points each
1.2: 3, 13 = 2 points each; 21 = 2.5 points (5 true-false questions at half a point each)
1.3: 5=1 point, 7 = 2 points, 9=1 point, 13 = 2 points, 25 = 1.5 points (3 TF at half a point each)
Lay1.1.pdf, Lay1.2.pdf, Lay1.3.pdf   Sections 1.1-1.3 of our text, for students who don't have the book yet.

Due January 24
hw2.pdf
Grading: 20 points possible, distributed as follows: .5 points "free".
1.4: 17, 19 = 2 points each, 25 = 1 point, 31 = 2 points.
1.5: 11, 21 = 2 points each; 23 = 2.5 points (5 true-false questions at half a point each), 31 = 2 points.
1.6: 7, 13 = 2 points each

Due January 31
hw3.pdf
Grading: 20 points possible, distributed as follows:
1.7: 5, 17 = 1 point each, 21 = 2 points; 27, 28 = 1 point each.
1.8: 9, 11 = 1 point each; 13, 27 = 2 points each.
1.9: 3, 9, 35, 39 = 2 points each

Due February 7
hw4.pdf
Grading: 20 points possible, distributed as follows:
2.1: 9 = 1 point, 25 = 2 points.
2.2: 7ab = 1 point each; w4.1a = 1 point, b = 2 points, c,d = 1 point each; e = 2 points; w4.2 = 2 points.
2.3: 11abcd = 1/2 point each; 15, 19 = 2 points each.

Due February 21
hw6.pdf
Grading: 20 points possible, distributed as follows:
3.1: 9 = 2 points, 25, 27, 29 = 1 point each.
3.2: 5 = 2 points; 39abde = 1/2 point each
3.3: 18 = 1 point (this is how I make matrices to invert on exams); 21, 27 = 2 points. w6.1abc = 2 points each.

Due February 28
hw7.pdf
Grading: 20 points possible, distributed as follows:
4.1: 3, 5 = 1 point each, 13, 19 = 1.5 points each.
4.2: 7, 9 = 2 points each, 25 = 3 points.
4.3: 15 = 2 points; w7.1ac = 2 points each; bd = 1 point each.

Due March 7
hw8.pdf
4.4: 3, 11 = 1 point each; 31b = 2 points
4.5: 11 = 1 point, 19abce = 1/2 point each; 25 = 1 point
4.6: 7 = 2 points, 9, 11 = 1 point each, 27 = 2 points. w8.1ab = 1 point each, d = 2 points; w8.2 = 2 points.

Due March 14
hw9.pdf
4.7: 1, 7 = 2 points each
5.1: 25 = 2 points
5.3: 21, 25 = 2 points each
w9.1 abd, w9.2b, w9.3 = 2 points each.

Due April 4
hw10.pdf
5.4: 5, 13, 17 = 2 points each
5.5: 1, 13 = 2 points each
5.6: 3, 4 = 2 points each; Google page rank 5ac, 7 = 2 points each.
6.1: 9, 11, 13, 17 = 1 point each
6.2: 3 = 1 point.

Due April 11
hw11.pdf
Grading: 20 points possible, plus 4 extra credit
6.2: 9 = 2 points
6.3: 7, 11, 21 = 2 points each; w12.1 = 4 points extra credit (a = 3 points, b = 1 point).
6.4: 7, w12.2ab, w12.3 = 2 points each.
6.5: 9, 17 = 2 points each.

Due April 18
hw12.pdf
powerlawsforhw.pdf   Maple and Wolfram alpha commands and output for taking ln-ln data and getting a least squares line fit to that, in order to model the original data with a power law.
powerlaws_forhw.mw (to download with the "openURL" command from Maple) I've added all the commands you'll need, in the order you'll need them, at the end of the document. Maple is available on all University computers, and google (or I, or lab assistants) can help you if you want to do something and don't know how.
https://matrixcalc.org/en/    This on-line matrix calculator can handle matrices of arbitrary size.
https://www.desmos.com/calculator    on-line grapher that will make great plots for your Fourier series question.
Grading: 20 points possible, plus 10 extra credit for power law problem
6.6: 1, 7 = 2 points each; height-weight power law problem = 10 points extra credit.
6.7: 25 = 3 points
6.8: w13.2a = 3 points, b = 1 point.
7.1: 4, 5 = 1 point each; 7, 15 = 2 points each; 19 = 3 points.

Due April 24 at 6:00 p.m.
hw13.pdf