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Unformatted text preview: Ben Cooke Math 107 Test 1 • Do not open this test booklet until you are directed to do so. • You have 50 minutes to earn 100 points. • This exam is closed book. You are not allowed to use a calculator. • Show your work, as partial credit will be given. • Do not spend too much time on any one problem. Read them all through first and attack them in the order that allows you to make the most progress. • Sign the affirmation of the Duke community standard after you complete the test and before you turn it in. Problem Points Grade Name 1 20 2 20 3 10 4 10 5 20 6 20 Total 100 Name: 1 Ben Cooke Math 107 1. (20 points) Given the matrix A, A = 1 2 1 2 3 1 1 2 2 (a) Find A 1 (b) Solve AX = B with B = 1 2 3 2 Ben Cooke Math 107 2. (20 points) Let A = bracketleftBigg 1 4 2 1 bracketrightBigg . (a) Find A + 3 I and A 3 I ....
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 Spring '07
 Trangenstein
 Math, Linear Algebra, Invertible matrix, Ben Cooke

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