Homework 3
MATH 231
Due Wednesday, October 8, 2025
 

Instructions. We wiill have a quiz in class on the due date based on the content from the assignment. See the back of the textbook for solutions and hints for odd-numbered problems. Click here for a pdf version of the homework.

Exercise 1.

Complete the following exercises from Section 1.4 in the course textbook:

# 17, 19, 21, 25, 27, 28, 30, 32, 36, 41, 43

Exercise 2.

Complete the following exercises from Section 1.5 in the course textbook:

# 7, 9, 11, 13, 15, 21, 27–36, 38–45

Exercise 3.

Complete the following exercises from Section 1.7 in the course textbook:

# 1, 3, 5, 7, 9 , 11, 13, 21–30, 37, 46

Exercise 4.

Let $𝐯\in {ℝ}^n$. Show that if $𝐯\cdot 𝐯=0$, then $𝐯=\mathrm{𝟎}$.