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One of the diagonals of parallelogram ...

One of the diagonals of parallelogram ABCD with `vec(a) and vec(b)` are adjacent sides is `vec(a) +vec(b)` . The other diagonal BD is `…………`

A

`vec(a) - vec(b)`

B

`vec(b) -vec(a)`

C

`vec(a)+vec(b)`

D

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

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