Practice Test A

  1. 1. 5×4; 9

  2. 2. [ 7395243128519 ]

  3. 3. { 4xz=3x+3y=92x+7y+5z=8

  4. 4. (10, 10, 0)

  5. 5. {(2, 3,2)}

  6. 6. { (207+117z, 27+67z, z) }

  7. 7. AB=[ 8148110 ]

  8. 8. AB=[1]

  9. 9. The product AB is not defined.

  10. 10. [ 62010144 ]

  11. 11. [ 202889296 ]

  12. 12. [ 125026 ]

  13. 13. [ 154014 ]

  14. 14. [ 1127815513 ]

  15. 15. [ 5231 ][ xy ]=[ 3218 ]

  16. 16. { 12x3y=52x+7y=9

  17. 17. X=[ 35143251853 ]

  18. 18. 12

  19. 19. 0

  20. 20. x=| 311611432 || 211111432 |, y=| 231161442 || 211111432 |,

    z=| 213116434 || 211111432 |

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