Which of the following operations is meaningless in vector algebra?
Which of the following operations is meaningless in vector algebra?
- A. a . (b × c)
- B. a × (b × c)
- C. (a . b) . c
- D. a + (b × c)
Answer: C) (a . b) . c
Explanation: a.b produces a scalar. You cannot take the dot product of a scalar with a vector c. Hence (a.b).c is meaningless.
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