1.

If 2bar(i)+3bar(j)+5bar(k), 2bar(i)+4bar(j)+5bar(k) and 2bar(i)+4bar(j)+7bar(k) are the vertices of DeltaABC, then its circum-centre is

Answer»

`2BAR(i)+7bar(J)+6bar(k)`
`2bar(i)+7/2bar(j)+6bar(k)`
`2bar(i)+bar(j)+3/2bar(k)`
`2bar(i)+1/2bar(j)+bar(k)`

ANSWER :B


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