Name: Duo Cao

Office: MATH 433

Office Hour: Wednesday 2-4pm at MATH 433 or by appointment

E-mail: cao157@purdue.edu

Teaching

Fall 2015, MA261 Multivariate Calculus Fall 2017, MA261 Multivariate Calculus

Spring 2018, MA262 Differential Equations and Linear Algebra

Fall 2019, MA261 Multivariate Calculus

Spring 2020, MA262 Differential Equations and Linear Algebra

**Hand-written homework due on Feb 21st: Homework 12-13**

Handwritten Homework 1-- Sect. 1.2 #3, 18. Sect. 1.3 # 1,2 (Offline)

Handwritten Homework 2-- Sect. 2.2 #31, 34 (Offline)

Handwritten Homework 3-- Sect. 2.3 #23, 25(a), 30 (Offline)

Handwritten Homework 4-- Sect. 2.4 #15, 29 (Offline)

Handwritten Homework 5-- Sect. 2.6 #44, 46

Handwritten Homework 6-- Sect. 3.4 #25. (Offline)

Handwritten Homework 7-- Sect. 7.1 #28,30. Sect. 72.#23,31

Handwritten Homework 8-- Sect. 7.3 #28. Sect. 7.4 #36 (Offline)

Handwritten Homework 9-- Sect. 7.5 #38. Sect. 7.7 #14, 40

Handwritten Homework 10-- Sect. 7.8 #23. Sect. 7.9 # 12 (Offline)

Handwritten Homework 11-- Sect. 8.1 # 11, 15 (Offline)

------------------------------------------------------------------------

**Due**

Handwritten Homework 12- Sect. 8.2 # 38 (Offline)

Handwritten Homework 13-- Sect. 9.1 # 3,10. Sect. 9.2. # 29 (Offline)

------------------------------------------------------------------------

Handwritten Homework 14-- Set. 9.3 # 32 (Offline)

Handwritten Homework 15-- Sect. 10.1 # 33 (Offline)

Handwritten Homework 16-- Sect. 10.2 # 30 (Offline)

Handwritten Homework 17-- Sect. 10.3 # 22, 23 (Offline)

Handwritten Homework 18- Sect. 10.5 #20, 27 (Offline)

Handwritten Homework 19-- Sect. 10.6 #16, 23 (Offline)

Handwritten Homework 20-- Sect. 11.1 # 23, 24 (Offline)

Handwritten Homework 21-- Sect.11.2 # 25 (Offline)

Handwritten Homework 22-- Sect. 11.5 # 24 (Offline)

Handwritten Homework 23-- Sect. 4.2 # 34 (Offline)

Handwritten Homework 24-- Sect. 4.3 #33 (Offline)

Handwritten Homework 25-- Sect. 4.4 # 35, 36 (Offline)

Handwritten Homework 26-- Sect. 4.5 #41 (Offline)

Handwritten Homework 27-- Sect. 4.6 # 20, 22 (Offline)

Handwritten Homework 28-- Sect. 4.7 #37, 41 (Offline)

Handwritten Homework 29-- Sect. 4.9 # 15 (Offline)

Handwritten Homework 30-- Sect. 5.1 #24, 27 (Offline)

Handwritten Homework 31-- Sect. 5.2 #20, 21 (Offline)

Handwritten Homework 32-- Sect. 5.3 #33 (Offline)

Handwritten Homework 33-- Sect. 6.4 #29, 30 (Offline)

Handwritten Homework 34-- Sect. 6.5 #37 (Offline)

Handwritten Homework 35-- Sect 6.6 #21 (Offline)

Handwritten Homework 36-- Sect. 6.7 #33 (Offline)

**Hand-written homework partial solutions (Let me know if you need solutions of other problems):**

**week1**

**week2**

I made a mistake for 7.5 #38. Answer should be no. In both case, A has at most 2 pivot columns.

week3 (none)

**Quiz solutions:**

**quiz1**

**quiz2**

**quiz3**

**quiz4**

**Next week quiz content (Feb 21st):**

1. Solve a linear ODE

2. Discuss linear system solutions