If a = 2i + j and b = i + 2j, then a·b equals:
If a = 2i + j and b = i + 2j, then a·b equals:
- A. 4
- B. 5
- C. 6
- D. 8
Answer: A) 4
Explanation: 2×1 + 1×2 = 4.
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If a = 2i + j and b = i + 2j, then a·b equals:
Answer: A) 4
Explanation: 2×1 + 1×2 = 4.
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