if a=2i+j-k,b=i+2j-4k,c=i+j+k then find (a×b).(b×c)
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Given, a=2i+3j-k, b=-i+2j-4k and c=i+j+k
If a=2i+3j-k, b=-i+2j-4k and c=i+j+k, then what is the value of (axb).(axc)?
= -42 – 32
= -74
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