If a = i + 2j and b = 2i − j, then a·b equals:
If a = i + 2j and b = 2i − j, then a·b equals:
- A. 0
- B. 1
- C. 2
- D. −1
Answer: A) 0
Explanation: 2 − 2 = 0.
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If a = i + 2j and b = 2i − j, then a·b equals:
Answer: A) 0
Explanation: 2 − 2 = 0.
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