推 JohnMash :你沒錯 04/16 22:01
Determine which of the following subsets of the vector space R^3
are subspaces. Briefly explain.
(ii) The set S2 of vectors (x,y,z) ∈ R^3 such that x + y - z = 0
課本習題說沒這個選項，
可是我看不大出來哪裡有錯，
請各位幫我指出哪裡錯誤，謝謝。
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