1. Which of the following is a subspace of R AW₁ = {(x, y, z) € R³ | x+y+z>0} BW₂ = {(x, y, z) € R³ | x+y+z=1} 3 3 CW3 = {(x, y, z) = R³ | x=y=z} 1123 | mai

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