[線代] 關於subspace的問題
{ [u1,u2,u3]^T 屬於R^3 | 2u1+5u2-4u3=0 or u1-2u2+3u3=0 }
This subset of R^n 是否為subspace?
解答上寫不是,想請問各位大大原因
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