If a = 2i + 3j + k and b = i − j + 2k, then a·b equals:
If a = 2i + 3j + k and b = i − j + 2k, then a·b equals:
- A. 1
- B. 5
- C. −1
- D. 7
Answer: A) 1
Explanation: 2−3+2=1.
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If a = 2i + 3j + k and b = i − j + 2k, then a·b equals:
Answer: A) 1
Explanation: 2−3+2=1.
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