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The triple product expansion of a × (b × c) is
Ab(a·c) − c(a·b)
Ba(a·c) − b(a·b)
Cc(a·b) − b(a·c)
Da(b·c) − c(a·b)
Answer & Solution
Correct answer: A. b(a·c) − c(a·b)
The identity known as the BAC minus CAB rule gives b times (a dot c) minus c times (a dot b).
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