# Hw7 - g = G 1 2 2 1 a. G 1 2 2 1 b. c. d. e. G 1 2 2 1 f....

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Math 1313 Homework 7 Section 2.6 1 1. Let g = G 4 3 −1 2 ± . Find the determinant (i.e. D = ad – bc). a. 11 b. 14 c. 5 d. -5 e. -11 f. None of the above. 2. Let ² = G −5 −3 6 4 ± . Find the determinant (i.e. D = ad – bc). a. 2 b. 6 c. -38 d. 1 e. -2 f. None of the above. 3. Let ³ = G −4 12 3 −9 ± . Find the determinant (i.e. D = ad – bc). a. -72 b. 0 c. 36 d. 18 e. 72 f. None of the above. 4. If the determinant of a matrix is 0, then the matrix has no inverse. a. True b. False 5. If 1 - B is the inverse of a matrix B, then 1 - B B (the product) gives the identity matrix. a. True b. False 6. Are the following matrices inverses of each other? G 4 5 2 3 ±, ´ 3 2 5 2 −1 2 µ a. Yes b. No 7. Are the following matrices inverses of each other? G 2 3 3 5 ±, G 5 −3 −3 2 ±

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Math 1313 Homework 7 Section 2.6 2 a. Yes b. No 8. Find the inverse of the following matrix
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Unformatted text preview: g = G 1 2 2 1 a. G 1 2 2 1 b. c. d. e. G 1 2 2 1 f. None of the Above . 9. Solve the system of equations by using the inverse of the coefficient matrix. 3 2 = 7 4 + 3 = 2 a. = 2, = 1 b. = 2, = 2 c. = 1, = 2 d. = , = 1 e. = 1, = 2 f. None of the above. 10. Solve the system of equations by using the inverse of the coefficient matrix. + 2 = 4 2 = 1 a. = , = b. = 2, = 1 Math 1313 Homework 7 Section 2.6 3 c. g = G , = d. g = G , = 2 e. g = 2, = 3 f. None of the above...
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## This note was uploaded on 09/15/2010 for the course MATH Math 1313 taught by Professor Abdelnourahmed-zaid during the Fall '10 term at University of Houston.

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Hw7 - g = G 1 2 2 1 a. G 1 2 2 1 b. c. d. e. G 1 2 2 1 f....

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