Basis of Orthogonal Complement

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SUMMARY

The discussion focuses on finding a basis for the orthogonal complement of the subspace S in R^3, which is spanned by the vector x = (1, -1, 1)^T. To determine the orthogonal complement, one must identify vectors (a, b, c)^T that satisfy the condition of orthogonality, specifically that their dot product with x equals zero. This leads to the equation a - b + c = 0, which defines the relationship among the components of the vectors in the orthogonal complement.

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georgetown13
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Let S be the subspace of R^3 spanned by x=(1,-1,1)^T.

Find a basis for the orthogonal complement of S.

I don't even know where to start... I would appreciate your help!
 
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If (a,b,c)^T is a general vector in R^3 then it's orthogonal to (1,-1,1)^T if the dot product is zero. What conditions does that give you on a, b and c?
 

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