1.

If the position vectors of three consecutive vertices of a parallelogram are bar(i)+bar(j)+bar(k),3bar(j)+5bar(k) and 7bar(i)+9bar(j)+11bar(k), then fourth vertex is

Answer»

`8BAR(i)+7bar(J)+7bar(K)`
`8bar(i)-7bar(j)-7bar(k)`
`7bar(i)-7bar(j)-7bar(k)`
`7bar(i)-7bar(j)+8bar(k)`

ANSWER :A


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