# Homeworks

• [6/6] Homework #6 (solution) (due: 17 June, before class )
• [6/6] Homework #5 (solution) (due: 13 June, 6pm room #312)
• [5/16] Homework #4 (solution) (due: 27 May, before class)
• [4/28] Solution of hw#3
• [4/20] Solution of hw#2
• [4/11] Homework #3 (Due: To be announced...)
• Excercises 3.1 (p.150~151): 20, 26, 27, 28, 30, 36
• Excercises 3.2 (p.159~160): 26, 36(b), 41, 43(a), 45
• Excercises 3.3 (p.176~178): 13, 30, 45, 56, 68
• Excercises 3.4 (p.187~189): 11, 13, 24
• [4/9] Homework #2 (Due: 19 Apr, before class)
• Excercises 2.2 (p.83~85): 16, 18, 33, 43, 50
• Excercises 2.3 (p.99~101): 5, 11, 31, 42
Hint for #42

(Note that there may be several ways to solve this problem.)

By Theorem 2.6, n vectors in A are linearly independent if and only if the equation "Ax=0" has a trivial solution (x=0) ONLY. Then, how many free variables do we have if we solve "Ax=0"?

• Excercises 2.4 (p.113~118): 3, 12, 18
• [4/1] Solution of hw#1
• [3/21] Homework #1 (Due: 1 Apr, before class)
• Excercises 1.2 (p.26~28): 17, 42, 46, 50, 53, 59(a), 64
* In 59(a), the Hint should be "See Excercise 55" not "See Excercise 47".
• Excercises 1.3 (p.41~44): 13, 15, 23, 24, 46