Consider the vector space V = C
2 with scalar multiplication over the real numbers R and let
W = {(z1, z2) ∈ V : z2 = z1 + 2z1}.
1.1 Use the Subspace Test to show that W is a subspace of V.
1.2 Find a basis for W.
1.3 Explain whether W is a subspace over C
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