Give an example of a vector space V over F2 and subspaces V1 and
V2 such that V1 ∪ V2 is not a subspace of V.
Give an example of a vector space V over C and subspaces V1 and
V2 such that V1 ∪ V2 is a subspace of V.
Give an example of a vector space V over F2 and subspaces V1 and V2 such that V1 ∪ V2 is not a subspace of V. Give an ex
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