1.

If 2bar(i)-bar(j)+bar(k), bar(i)-3bar(j)-5bar(k), 3bar(i)-4bar(j)-4bar(k) are the vertices of a triangle then the vector equation of the median passing through 2bar(i)-bar(j)+bar(k) is

Answer»

`bar(r)=(2bar(i)-bar(J)+bar(k))+t(2bar(i)-7/2bar(j)-9/2bar(k))`
`bar(r)=(2bar(i)-bar(j)+bar(k))+t(5bar(j)+11bar(k))`
`bar(r)=(bar(i)-3BAR(j)-5bar(k))+t(2bar(i)-9/2bar(k))`
`bar(r)=(2bar(i)-bar(j)+bar(k))+t(5bar(i)+11bar(k))`

ANSWER :B


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