第九章单元测试
  1. What is the vector where is point and is point .( )

  2. A: B: C: D:
    答案:
  3. Given , , . Find: .( )

  4. A:-3 B:-2 C:3 D:2
  5. Given , , . Find: .( )

  6. A:5 B:6 C:-6 D:-5
  7. Given , , . Find: the angle between and .( )

  8. A: B: C: D:
  9. Vectors and are defined in terms of and as and .( )
    If , find the values of and .

  10. A:, B:, C:, D:,
  11. Is that the vectors and are perpendicular?( )

  12. A:对 B:错
  13. If and , find and the angle between and .( )

  14. A:, B:, C:, D:,
  15. Let , , find .( )

  16. A:3 B:4 C:-4 D:-3
  17. Let be a standard-position vector with terminal point . Let be a vector with initial point and terminal point . Find the magnitude of vector .( )

  18. A:10 B:15 C:-10 D:-15
  19. Consider vectors , , . Determine the scalars and such that .( )

  20. A:, B:, C:, D:,

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