quiz 2 answers

Linear Algebra with Applications

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Name: Tuesday section time: Student ID: Math 20F - Linear Algebra - Winter 2003 Quiz #2 — January 21 (Do not discuss quiz with students who haven’t taken it yet – until 8:00pm.) 1. Let A = ± 123 - 10 - 1 . (a) What is A T ? ANSWER: A T = 1 - 1 20 3 - 1 (b) Compute AA T . ANSWER: AA T = ± 14 - 4 - 42 (c) Does A have an inverse? Explain why or why not. (Watch out for this being a ‘trick’ question!) ANSWER: No, A is not invertible, since A is not square.
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This homework help was uploaded on 01/23/2008 for the course MATH 20F taught by Professor Buss during the Winter '03 term at UCSD.

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