MIT Challenge 18.06
# My [MIT Challenge](https://www.scotthyoung.com/blog/myprojects/mit-challenge-2/): 18.06 Liner Algebra [Video MIT 18.06 Linear Algebra, Spring 2005](https://www.youtube.com/watch?v=ZK3O402wf1c&list=PLE7DDD91010BC51F8) [MIT18_06S10_Final_Exam](https://ocw.mit.edu/courses/mathematics/18-06-linear-algebra-spring-2010/exams/MIT18_06S10_Final_Exam.pdf) [Answers](https://ocw.mit.edu/courses/mathematics/18-06-linear-algebra-spring-2010/exams/MIT18_06S10_Final_Answers.pdf) ``` day1~4: watch video. 40: 56-4*4. 3 hours. close. 72: 100-4*5-3*2-1. 1 day. with internet. ``` 1.a ``` L'A=L'LU L'[A I]=[U L'] L'[L I]=[I L'] L= 1 0 0 2 1 0 3 3 1 U= 1 2 0 1 0 0 1 2 0 0 0 0 ``` 1.b ``` 1 0 0 0 0 1 0 0 0 0 0 0 2 independent cols. ``` 1.c ``` [-2 1 0 0]` and [-1 0 -2 1]` ``` ``` Grading: MIT answer [3 -2 0 1] is wrong. Reason: 1. [1 2 0 1] * [3 -2 0 1]` != 0 2. Calculate online: http://www.math.odu.edu/~bogacki/cgi-bin/lat.cgi?c=null `...