This preview shows page 1. Sign up to view the full content.
Unformatted text preview: =3 3) Answer each part with True or False. a) If A is a 3x5 matrix then A x = b is overdetermined. b) If A is a 3x5 matrix in REF then a 32 = 0. c) Interchanging two equations in a system is a Type I operation. d) If A is nonsingular, then A x = b is consistent. e) A homogeneous system with a nonzero solution has innitely many solutions. Answers: 1) See the example on page 21, and the matrix at the top of page 22. But your answer should be in equation form, so write x 1x 2 = 160 etc (4 equations). 2) This is already in REF, and x 3 = is free. From Back Sub., we get { (84 , 3 + , ) } 3) FTTTT (you can ask me about these, of course). 1...
View
Full
Document
 Spring '09
 JULIANEDWARDS

Click to edit the document details