1.

If a=hati-2hatj-3hatk, b=2hati+hatj-k,c=hati+3hatj-2hatk, then [(axxb)xx(bxxc)(bxxc)xx(cxxa)(cxxa)xx(axxb)]=

Answer»

160000
`-8000`
400
`-40`

ANSWER :A


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