1.

If A(bar(i)+2bar(j)+3bar(k)), B(-bar(i)-bar(j)+8bar(k)), C(-4bar(i)+4bar(j)+6bar(k)) are the vertices of a triangle then the equation of the line passing through the circumcentre and parallel to bar(AB) is

Answer»

`BAR(R)=(-4/3BAR(i)+5/3bar(J)+17/3bar(k))+t(2bar(i)+3bar(j)-5bar(k))`
`bar(r)=(2bar(i)+3bar(j)+5bar(k))+t(2bar(i)-3bar(j)-5bar(k))`
`bar(r)=(4/3bar(i)-5/3bar(j)-17/3bar(k))+t(2bar(i)-3bar(j)+5bar(k))`
`bar(r)=(-4/3bar(i)-5/3bar(j)-17/3bar(k))+t(2bar(i)+3bar(j)+5bar(k))`

Answer :A


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