Exercise 5.3.1 Which of the following sets are subspaces of R³? Explain. ----B-- u (a) V₁ = (b) V₂ = -{- -[] | U2 (c) V3 = (d) V4= = (e) V5 {-- U1 u= U2 uz u UI U2 Uz *-{--3]|-----} u= ≤ 4 ui 20 for each i = 1,2,3 2,3}. uz +U₁ = 2u₂ Uz zu1 0

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