1.

If the position vectors of A, B are 2bar(i)-9bar(j)-4bar(k), 6bar(i)-3bar(j)+8bar(k) then the unit vector in the direction of vec(AB) is

Answer»

`bar(R)=t(4bar(i)-6bar(j)+8BAR(k))`
`bar(r)=t(4bar(i)-2bar(k))`
`bar(r)=t(2bar(i)+3BAR(j)-6bar(k))`
`bar(r)=t(6bar(i)-3bar(j)+2bar(k))`

Answer :B


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