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OABC is a tetrahedron D and E are the mi...

OABC is a tetrahedron D and E are the mid points of the edges `bar(OA) and bar(BC)`. Then the vector `bar(DE)` in terms of `bar(OA),bar(OB)` and `bar(OC)`.

A

`(1)/(2) (bar(OA)+bar(OB)+bar(OC))`

B

`(1)/(2)(bar(OA)+bar(OB)-bar(OC))`

C

`(1)/(2) (bar(OA)-bar(OB)+bar(OC))`

D

`(1)/(2)(bar(OB)+bar(OC) - bar(OA))`

Text Solution

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The correct Answer is:
D
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  10. In a parallelogram ABCD, P is the mid point of the side AD. The line ...

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  11. OABC is a tetrahedron D and E are the mid points of the edges bar(OA)...

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  12. In the Cartesian plane, O is the origin of the coordinate axes. A pers...

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  14. The projections of a vector on the three coordinate axes are 6, -3, 2 ...

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