Common zone of planes

Thread Starter

boks

Joined Oct 10, 2008
218
What's the common zone for the planes (1 1 1), (0 0 2) and (2 2 0)?

Attempt:

u + v + w = 0
2w = 0
2u + 2v = 0

--> w = 0, u = -v

<1 -1 0>

The solutions manual says [1 -1 0], but isn't the zone a form?
 
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