DeltaABC be an equilateral triangle whos...

`DeltaABC` be an equilateral triangle whose orthocentre is the origin 'O'. If `bar(OA)=bar(a), bar(OB)=bar(b)" then "bar(OC)` is

`bar(a)+bar(b)`

`(bar(a)+bar(b))/2`

`-(bar(a)+bar(b))`

`-2(bar(a)+bar(b))`

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AAKASH SERIES-PROPERTIES OF VECTORS-EXERCISE - II

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