1.

Let bara, barb, barc be three non-coplanar vectors and barr be any vector in space such that barr.bara=1,barr.barb=2 and barr.barc=3 If [barabarb barc]=1, then : barr=

Answer»

`bara+2barb+3barc`
`(barbxxbarc)+2(barcxxbara)+3(BARAXXBARB)`
`(barb.barc)bara+2(barc.bara)barb+3(bara.barb)barc`
none of these

Answer :B


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