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Unformatted text preview: A , B and C are 4 × 4 matrices with C = ( B T ) 2 . Further, given that det( A ) = 2 and det( B ) = 3. Find det(3 A3 B 2 C2 ). (5+5=10 points) Part II Solutions to problems here MUST BE WRITTEN IN DETAIL. You need not reprove theorems that I stated as such. However, if you use something from a problem that you have worked out before, you need to show those steps as well. 4. Do there exist invertible 3 × 3 matrices X and Y such that XY X1 Y1 = 1 0 2 0 2 1 0 0 1 ? Justify your answer rigorously. Hint: Think whether I have done a problem in class that is ”ideologically” similar. ... (10 points) 5. Let A be an n × n matrix. Show that the coeﬃcient of x n1 in det( xIA ) is equal toTr( A ). (10 points). 6. Find 2010 pairwise distinct 2 × 2 matrices A such that A 2010 = ± 1 0 0 1 ¶ . Hint: The key to this could lie with some geometry that we discussed. ...(10 points) 2...
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This note was uploaded on 05/01/2010 for the course MATH 2310 taught by Professor Andrewfrohmader during the Spring '08 term at Cornell.
 Spring '08
 ANDREWFROHMADER
 Math

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