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If the distance of the point (1,1,1) fro...

If the distance of the point (1,1,1) from the origin is half its distance from the plane `x+y+z+k=0`, then k is equal to

A

`pm 3`

B

`pm6`

C

`-3,9`

D

`3,-9`

Text Solution

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The correct Answer is:
D
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